[go: up one dir, main page]

EP0674135A1 - Gasbrenner für Industrieöfen - Google Patents

Gasbrenner für Industrieöfen Download PDF

Info

Publication number
EP0674135A1
EP0674135A1 EP95400603A EP95400603A EP0674135A1 EP 0674135 A1 EP0674135 A1 EP 0674135A1 EP 95400603 A EP95400603 A EP 95400603A EP 95400603 A EP95400603 A EP 95400603A EP 0674135 A1 EP0674135 A1 EP 0674135A1
Authority
EP
European Patent Office
Prior art keywords
orifices
burner
series
air
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95400603A
Other languages
English (en)
French (fr)
Other versions
EP0674135B1 (de
EP0674135B2 (de
Inventor
Alain Usai
Serge Silvestrini
Jean-Claude Dieuloufet
Philippe Domini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9461507&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0674135(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0674135A1 publication Critical patent/EP0674135A1/de
Publication of EP0674135B1 publication Critical patent/EP0674135B1/de
Application granted granted Critical
Publication of EP0674135B2 publication Critical patent/EP0674135B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion

Definitions

  • the invention relates to a gas burner, of the type used in industrial ovens, for example in furnaces for heating steel products, such as slab ovens, or heat treatment ovens, etc.
  • These burners are high power burners, of the order of 1000 to 6000 therms or more, supplied in particular with steel gas (mixed gas, coke oven gas, etc.) under low pressure ( ⁇ 1 bar).
  • burners of this type are already known, which generally comprise several concentric channels for supplying combustible gases and air, opening at the level of the burner nose, downstream of which combustion occurs.
  • burners are known comprising a central fuel gas supply channel, surrounded by two concentric annular air supply channels.
  • Other burners are also known, studied to improve the mixture of combustible and oxidizing gases, and therefore combustion, in which the combustible gas arrives at the nose of the burner by an annular channel situated between a central channel and a peripheral annular channel, these two channels for supplying combustion air.
  • the object of the invention is therefore to reduce the level of nitrogen oxide in the combustion gases, while ensuring good combustion and a good flame structure, and this despite the variations in power which may be necessary during the implementation of burners.
  • the combination of the divergent flow of combustion gases and the swirling flow of combustion air leads, when these two flows meet near the burner nose, to a strong mixing of the gas and the air, and therefore at a homogenization of the mixture and improved combustion.
  • the gas jets coming from the gas outlet orifices and directed towards the outside tend to widen the flame by giving it a flared, cup-shaped shape of small thickness, the high temperature zone of the flame being formed only by the wall of this cup.
  • the residence time of the combustion products in this high temperature zone is reduced, compared to a more concentrated flame which defines a high temperature zone in the form of a substantially cylindrical full volume, in which the combustion products combustion stay longer.
  • the burner nose comprises, at the center of the first series of gas passage orifices, a part protruding outwards from the burner, relative to the substantially planar front surface, perpendicular to the axis of the burner, where said first and second series of orifices open.
  • This protruding part prevents the recirculation of the combustion products which would disturb the gas outlet, in the immediate vicinity of the gas orifices.
  • it promotes this recirculation at a greater distance from the burner nose, which tends to rapidly remove the combustion products from the zone at high temperature, and therefore to further reduce the amount of nitrogen oxides formed.
  • the burner 1 comprises a box 2 for supplying combustible gas and air, formed by a central channel 3 for supplying the gas, oriented in the axial direction X of the burner, surrounded by a first annular channel 4 for supplying air, and a second annular peripheral channel 5 also supplied with air.
  • These three coaxial channels are supplied with gas and air respectively by respective supply conduits 6, 7, 8.
  • the burner 1 also includes a nose 10, also called a diffuser, generally made of a ceramic material.
  • the nose 10 consists of a thick plate 11 which covers the axial ends of the different channels, ensuring sealing between them, and which is inserted in a housing provided in the internal lining of the oven 12, being held there by fixing means, not shown, on the wall 13 of the oven.
  • the upstream face of the burner nose has a flat front surface 17 into which open the gas passage orifices 14 and the orifices 15, and a peripheral annular part, 18 prominent relative to said front surface, to the surface of which open the holes 16.
  • the orifices 14 for the passage of gas are inclined relative to the axial direction X of the burner, forming with the latter an angle ⁇ of between 15 and 25 °.
  • the air passage orifices 15 are made so that the axis of each orifice is situated in a plane parallel to the axial direction of the burner and tangent to the circle C2, and inclined in this plane, by an angle ⁇ of 15 at 25 ° with respect to said axial direction (see Figure 2).
  • the orifices 15 are therefore oriented in a helix, so that the flow of air which escapes therefrom has a rotational movement around the axis X of the burner.
  • the orifices 16 are inclined at an angle ⁇ between 0 ° and 10 ° relative to the axis and preferably about 5 °. An angle that is too steep leads in fact to a shortening of the flame such that, in certain cases, elements or organs of the furnace close to the burner can undergo an excessive rise in temperature.
  • the nose of the burner comprises, in its central part, between the orifices 14, a frustoconical part 19 protruding from the front surface 17, the truncated cone having its large base at the level of this front surface. Between the frustoconical part 19 and the protruding part 18 is thus formed an annular groove 20 of trapezoidal section, in which open the gas passage orifices 14 and the orifices 15 of the first series of air passage orifices.
  • the orifices 14 for the passage of gas open out to the front surface 17 in an angular position intermediate between the outlets of two orifices 15 for the passage of adjacent air (FIG. 3).
  • the swirling air flow coming from the orifices 15 intersects the gas flow coming from the orifices 14 in direct proximity to the front surface 17, thus creating a strong mixing of the gas and the air, and therefore a homogeneous mixture ensuring a very good combustion.
  • the inclination of the gas passage orifices 14 has the effect that the air-gas mixture tends to form a curtain in the form of a flared cup, in which the temperature due to combustion is maximum.
  • the central zone of this cut, in the axis of the burner is relatively clear and allows downstream of the burner a recirculation of the combustion products which can thus quickly leave the hottest zone, which, as indicated previously, is favorable for reducing the level of nitrogen oxide formed.
  • the orifices 16 for peripheral air passage comprise, on the side of the supply channel, a conical chamfer 21, with an apex angle close to 30 °, which widens the inlet of these orifices and has the effect of reducing losses of charges in the circuit formed by the peripheral channel 5 and the said orifices, and therefore increasing, at constant pressure, the speed of exit of the air.
  • the distribution of the air flow rates in the annular 4 and peripheral 5 channels makes it possible to adjust the length of the flame as required. Indeed, for a given total air flow, for example 3900 Nm3 / h, in the case of a burner providing 3500 thermies / hour, if this flow is distributed between the two channels 4 and 5 and therefore between the two series orifices 15 and 16, for example 1900 Nm3 / h for the peripheral air (passing through orifices 16) and 2000 Nm3 / h for the central air (passing through orifices 15) the speeds at the outlet of these orifices are substantially equal, of the order of 95 m / s. Under these conditions, combustion will start, as indicated above, in the immediate vicinity of the nose 10, and a short flame will be obtained.
  • the speed of the air ejected through these orifices will be high, for example 170 m / s.
  • This high speed allows ambient combustion products (colder) to be created, thereby creating natural recirculation on the periphery of the flame, which limits the production of NOx.
  • combustion will occur at a greater distance from the burner nose, since the gas will only meet the peripheral air relatively far from the burner, and on the other hand, it will continue far from the burner. , due to the high speed of the air, thus forming a long flame.
  • a flame of intermediate length can be obtained by correctly adapting the ratio of the air flow rates between central air and peripheral air.
  • the central air flow will however be limited to 50% at most of the total air flow to avoid a too short flame whose hot point is too close to the wall of the furnace or the support beams of the slabs.
  • the invention makes it possible to obtain very good combustion and a low nitrogen oxide content of the combustion products.
  • the air flows are improved, in particular compared to conventional arrangements where the air arrives in the channels in a radial direction and strikes the walls located opposite the inlet pipe before being distributed in the channels.
  • the inlet side is determined so as to cause the air in the channel 4 to rotate in the same direction as the rotation induced by the inclination. orifices 15 of the burner nose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
EP95400603A 1994-03-24 1995-03-20 Gasbrenner für Industrieöfen Expired - Lifetime EP0674135B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9403633 1994-03-24
FR9403633A FR2717884B1 (fr) 1994-03-24 1994-03-24 Brûleur à gaz pour fours industriels.

Publications (3)

Publication Number Publication Date
EP0674135A1 true EP0674135A1 (de) 1995-09-27
EP0674135B1 EP0674135B1 (de) 1999-06-23
EP0674135B2 EP0674135B2 (de) 2002-08-21

Family

ID=9461507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400603A Expired - Lifetime EP0674135B2 (de) 1994-03-24 1995-03-20 Gasbrenner für Industrieöfen

Country Status (5)

Country Link
EP (1) EP0674135B2 (de)
AT (1) ATE181593T1 (de)
DE (1) DE69510395T3 (de)
ES (1) ES2132550T5 (de)
FR (1) FR2717884B1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775868A1 (de) * 1995-11-23 1997-05-28 Sollac S.A. Gasbrenner für Aufwärmöfen für siderurgische Produkte
EP0823593A3 (de) * 1996-08-05 1998-11-04 The BOC Group plc Emissionsarmer Wirbelbrenner
WO2003081129A1 (en) * 2002-03-16 2003-10-02 Exxonmobil Chemical Patents Inc. Burner tip and seal for optimizing burner performance
WO2003081136A1 (en) * 2002-03-22 2003-10-02 Danieli & C. Officine Meccaniche S.P.A. Burner
FR2930626A1 (fr) * 2008-04-28 2009-10-30 Fives Pillard Sa Bruleur a points peripheriques d'injection d'air a flux axial
CN102012024A (zh) * 2010-11-12 2011-04-13 新兴能源装备有限公司 一种活性石灰回转窑发生炉的煤气燃烧器
WO2013091634A1 (en) * 2011-12-23 2013-06-27 Flsmidth A/S A method and a burner for introducing fuel into a burning zone of a kiln
WO2013125972A1 (en) * 2012-02-21 2013-08-29 General Electric Company A combustor nozzle and method of supplying fuel to a combustor
CN105588118A (zh) * 2016-03-09 2016-05-18 浙江尚鼎工业炉有限公司 一种燃气加热炉
CN106287705A (zh) * 2016-08-25 2017-01-04 郭玉 一种燃气喷枪
CN106765216A (zh) * 2017-02-27 2017-05-31 洛阳明远石化技术有限公司 燃烧器和尾气焚烧设备
EP3336428A1 (de) * 2016-12-15 2018-06-20 Fives Pillard Brenner mit niedrigen nox-emissionen
EP3350513A1 (de) * 2015-07-31 2018-07-25 Nuvera Fuel Cells, LLC Brenneranordnung mit geringen nox-emissionen

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408796B (de) * 1999-04-29 2002-03-25 Dumag Ohg Brenner
US6869277B2 (en) 2002-03-16 2005-03-22 Exxonmobil Chemical Patents Inc. Burner employing cooled flue gas recirculation
US6887068B2 (en) 2002-03-16 2005-05-03 Exxonmobil Chemical Patents Inc. Centering plate for burner
US7322818B2 (en) 2002-03-16 2008-01-29 Exxonmobil Chemical Patents Inc. Method for adjusting pre-mix burners to reduce NOx emissions
US6846175B2 (en) 2002-03-16 2005-01-25 Exxonmobil Chemical Patents Inc. Burner employing flue-gas recirculation system
US6866502B2 (en) 2002-03-16 2005-03-15 Exxonmobil Chemical Patents Inc. Burner system employing flue gas recirculation
US6877980B2 (en) 2002-03-16 2005-04-12 Exxonmobil Chemical Patents Inc. Burner with low NOx emissions
US6881053B2 (en) 2002-03-16 2005-04-19 Exxonmobil Chemical Patents Inc. Burner with high capacity venturi
US6893252B2 (en) 2002-03-16 2005-05-17 Exxonmobil Chemical Patents Inc. Fuel spud for high temperature burners
US6893251B2 (en) 2002-03-16 2005-05-17 Exxon Mobil Chemical Patents Inc. Burner design for reduced NOx emissions
US6890172B2 (en) 2002-03-16 2005-05-10 Exxonmobil Chemical Patents Inc. Burner with flue gas recirculation
US6986658B2 (en) 2002-03-16 2006-01-17 Exxonmobil Chemical Patents, Inc. Burner employing steam injection
DE60334535D1 (de) 2002-03-16 2010-11-25 Exxonmobil Chem Patents Inc Lösbarer zündelementdeckel für einen brenner
RU169821U1 (ru) * 2016-10-27 2017-04-03 Акционерное общество "ЕВРАЗ Объединенный Западно-Сибирский металлургический комбинат", АО "ЕВРАЗ ЗСМК" Многосопловая головка газокислородной горелки

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209811A (en) * 1963-03-28 1965-10-05 Loftus Engineering Corp Combination high velocity burner
US4728284A (en) * 1987-02-12 1988-03-01 Maxon Corporation Adjustable combustion rate air/fuel proportioned burner assembly
EP0347956A1 (de) * 1988-04-05 1989-12-27 T.T.C. TERMO TECNICA CERAMICA S.p.A. Luft und Gas mischende Düse für Gasbrenner, insbesondere für Brenner niedriger Wärmeleistung in Brennöfen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209811A (en) * 1963-03-28 1965-10-05 Loftus Engineering Corp Combination high velocity burner
US4728284A (en) * 1987-02-12 1988-03-01 Maxon Corporation Adjustable combustion rate air/fuel proportioned burner assembly
EP0347956A1 (de) * 1988-04-05 1989-12-27 T.T.C. TERMO TECNICA CERAMICA S.p.A. Luft und Gas mischende Düse für Gasbrenner, insbesondere für Brenner niedriger Wärmeleistung in Brennöfen

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775868A1 (de) * 1995-11-23 1997-05-28 Sollac S.A. Gasbrenner für Aufwärmöfen für siderurgische Produkte
FR2741702A1 (fr) * 1995-11-23 1997-05-30 Lorraine Laminage Bruleur a gaz pour four de rechauffage de produits siderurgiques
EP0823593A3 (de) * 1996-08-05 1998-11-04 The BOC Group plc Emissionsarmer Wirbelbrenner
WO2003081129A1 (en) * 2002-03-16 2003-10-02 Exxonmobil Chemical Patents Inc. Burner tip and seal for optimizing burner performance
WO2003081136A1 (en) * 2002-03-22 2003-10-02 Danieli & C. Officine Meccaniche S.P.A. Burner
US7004408B2 (en) 2002-03-22 2006-02-28 Danieli & C. Officine Meccaniche S.P.A. Burner
CN102016412B (zh) * 2008-04-28 2012-07-18 法孚皮拉德公司 带有用于轴向流的周边空气注入点的燃烧器
WO2009138653A2 (fr) * 2008-04-28 2009-11-19 Fives Pillard Brûleur à points périphériques d'injection d'air à flux axial
WO2009138653A3 (fr) * 2008-04-28 2010-01-14 Fives Pillard Brûleur à points périphériques d'injection d'air à flux axial
FR2930626A1 (fr) * 2008-04-28 2009-10-30 Fives Pillard Sa Bruleur a points peripheriques d'injection d'air a flux axial
CN102012024A (zh) * 2010-11-12 2011-04-13 新兴能源装备有限公司 一种活性石灰回转窑发生炉的煤气燃烧器
WO2013091634A1 (en) * 2011-12-23 2013-06-27 Flsmidth A/S A method and a burner for introducing fuel into a burning zone of a kiln
CN104136851A (zh) * 2012-02-21 2014-11-05 通用电气公司 燃烧器喷嘴以及向燃烧器供应燃料的方法
WO2013125972A1 (en) * 2012-02-21 2013-08-29 General Electric Company A combustor nozzle and method of supplying fuel to a combustor
EP3350513A1 (de) * 2015-07-31 2018-07-25 Nuvera Fuel Cells, LLC Brenneranordnung mit geringen nox-emissionen
JP2018522200A (ja) * 2015-07-31 2018-08-09 ヌヴェラ・フュエル・セルズ，エルエルシー ＮＯｘ放出が低減されたバーナーアセンブリ
CN105588118A (zh) * 2016-03-09 2016-05-18 浙江尚鼎工业炉有限公司 一种燃气加热炉
CN105588118B (zh) * 2016-03-09 2017-10-17 浙江尚鼎工业炉有限公司 一种燃气加热炉
CN106287705A (zh) * 2016-08-25 2017-01-04 郭玉 一种燃气喷枪
EP3336428A1 (de) * 2016-12-15 2018-06-20 Fives Pillard Brenner mit niedrigen nox-emissionen
CN106765216A (zh) * 2017-02-27 2017-05-31 洛阳明远石化技术有限公司 燃烧器和尾气焚烧设备

Also Published As

Publication number Publication date
EP0674135B1 (de) 1999-06-23
FR2717884B1 (fr) 1996-06-07
ES2132550T5 (es) 2002-12-16
ATE181593T1 (de) 1999-07-15
DE69510395D1 (de) 1999-07-29
DE69510395T2 (de) 2000-01-13
DE69510395T3 (de) 2003-04-17
ES2132550T3 (es) 1999-08-16
EP0674135B2 (de) 2002-08-21
FR2717884A1 (fr) 1995-09-29

Similar Documents

Publication Publication Date Title
EP0674135B2 (de) Gasbrenner für Industrieöfen
AU729656B2 (en) Oxy/oil swirl burner
AU713968B2 (en) Low emission swirl burner
FR2487044A1 (fr) Bruleur a combustibles solides
FR2535018A1 (fr) Bruleur a charbon pulverise
BE1015604A3 (fr) Procede et dispositif pour augmenter la stabilite de la flamme dans les foyers au charbon pulverise.
CA2053457A1 (fr) Procede de chauffe d'une enceinte thermique et bruleur
EP0703410B1 (de) Brenner mit einem Brennerstein und Verfahren zu dessen Verwendung
EP0242249B1 (de) Brenner mit niedriger Schadstoffemission im Abgas
EP3105506B1 (de) Brennermodul im strom
EP0850883A2 (de) Verfahren zur Herstellung von technischem Glas und Brenner zur Durchführung des Verfahrens
EP0775868B1 (de) Gasbrenner für Aufwärmöfen für siderurgische Produkte
FR2772888A1 (fr) Amelioration aux bruleurs a combustible solide
EP0549415B1 (de) Gasbrenner mit Verbrennungsgitter, Verbrennungsverfahren und Heizungsanlage mit einem solchen Brenner
EP0089924B1 (de) Gasbrenner
FR2518725A1 (fr) Installation de cuisson du ciment a four rotatif tubulaire et a refrigerant relie au four par un puits
EP0493994A1 (de) Einrichtung zum Zünden eines Bettes aus Mischwerkstoffen, wie z.B. Erz und Koks
EP2314921A2 (de) Verfahren zum Betrieb eines Heizkessels
BE821191A (fr) Bruleur a impulsion et installation equipee d'un tel bruleur
FR2947037A1 (fr) Appareil de chauffage avec conduit d'introduction d'air
BE522551A (de)
FR2788838A1 (fr) Procede de chauffage utilisant un bruleur a combustible liquide
BE648130A (de)
BE553672A (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19951208

17Q First examination report despatched

Effective date: 19970704

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990623

REF Corresponds to:

Ref document number: 181593

Country of ref document: AT

Date of ref document: 19990715

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69510395

Country of ref document: DE

Date of ref document: 19990729

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2132550

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990826

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990923

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990923

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: KHD HUMBOLDT WEDAG AG, KOELN

Effective date: 20000317

NLR1 Nl: opposition has been filed with the epo

Opponent name: KHD HUMBOLDT WEDAG AG, KOELN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000719

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20020821

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE

NLR2 Nl: decision of opposition
NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)

Effective date: 20021030

REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Date of ref document: 20020910

Kind code of ref document: T5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040227

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040302

Year of fee payment: 10

Ref country code: LU

Payment date: 20040302

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040303

Year of fee payment: 10

Ref country code: AT

Payment date: 20040303

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040305

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040310

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040319

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040512

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050320

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050320

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050320

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050321

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050331

BERE Be: lapsed

Owner name: S.A. *SOLLAC

Effective date: 20050331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051001

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051001

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20051001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20051130

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050321

BERE Be: lapsed

Owner name: S.A. *SOLLAC

Effective date: 20050331