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NO993330L - Device for stirring and admixing air in a liquid and eliminating foam in a tank for treating said liquid - Google Patents

Device for stirring and admixing air in a liquid and eliminating foam in a tank for treating said liquid

Info

Publication number
NO993330L
NO993330L NO993330A NO993330A NO993330L NO 993330 L NO993330 L NO 993330L NO 993330 A NO993330 A NO 993330A NO 993330 A NO993330 A NO 993330A NO 993330 L NO993330 L NO 993330L
Authority
NO
Norway
Prior art keywords
liquid
stirring
treating
tank
eliminating foam
Prior art date
Application number
NO993330A
Other languages
Norwegian (no)
Other versions
NO320784B1 (en
NO993330D0 (en
Inventor
Alain Boulant
Original Assignee
Carbofil International
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
Application filed by Carbofil International filed Critical Carbofil International
Publication of NO993330L publication Critical patent/NO993330L/en
Publication of NO993330D0 publication Critical patent/NO993330D0/en
Publication of NO320784B1 publication Critical patent/NO320784B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/226—"Deep shaft" processes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
    • A61K8/466—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfonic acid derivatives; Salts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A61Q19/10—Washing or bathing preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/02—Preparations for cleaning the hair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2311—Mounting the bubbling devices or the diffusers
    • B01F23/23112—Mounting the bubbling devices or the diffusers comprising the use of flow guiding elements adjacent or above the gas stream
    • B01F23/231122—Mounting the bubbling devices or the diffusers comprising the use of flow guiding elements adjacent or above the gas stream the flow guiding elements being dome-shaped elements, i.e. for trapping air, e.g. cap-, umbrella- or inversed cone-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23362—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced under the stirrer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/16—Amines or polyamines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof
    • C11D1/10—Amino carboxylic acids; Imino carboxylic acids; Fatty acid condensates thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/28—Sulfonation products derived from fatty acids or their derivatives, e.g. esters, amides
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/34—Derivatives of acids of phosphorus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/12—Prevention of foaming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Materials Engineering (AREA)
  • Dermatology (AREA)
  • Epidemiology (AREA)
  • Birds (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Physical Water Treatments (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Activated Sludge Processes (AREA)
  • Accessories For Mixers (AREA)
  • Coating Apparatus (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Degasification And Air Bubble Elimination (AREA)
NO19993330A 1997-01-08 1999-07-05 Device for stirring and admixing air in a liquid and eliminating foam in a tank for treating said liquid NO320784B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9700116A FR2758094B1 (en) 1997-01-08 1997-01-08 DEVICE FOR BREWING AND AERATING A LIQUID AND FOR REMOVING FOAM IN A LIQUID TREATMENT TANK
PCT/FR1997/002463 WO1998030319A1 (en) 1997-01-08 1997-12-30 Device for stirring and aerating a liquid and eliminating the foam in a vat for treating this liquid

Publications (3)

Publication Number Publication Date
NO993330L true NO993330L (en) 1999-07-05
NO993330D0 NO993330D0 (en) 1999-07-05
NO320784B1 NO320784B1 (en) 2006-01-30

Family

ID=9502440

Family Applications (1)

Application Number Title Priority Date Filing Date
NO19993330A NO320784B1 (en) 1997-01-08 1999-07-05 Device for stirring and admixing air in a liquid and eliminating foam in a tank for treating said liquid

Country Status (36)

Country Link
EP (1) EP0954373B1 (en)
JP (1) JP3651806B2 (en)
KR (1) KR100488114B1 (en)
CN (1) CN1090050C (en)
AR (1) AR011367A1 (en)
AT (1) ATE265263T1 (en)
AU (1) AU720825B2 (en)
BG (1) BG64414B1 (en)
BR (1) BR9714271A (en)
CA (1) CA2276760C (en)
CO (1) CO4761080A1 (en)
CU (1) CU22785A3 (en)
CZ (1) CZ297858B6 (en)
DE (1) DE69728905T2 (en)
DK (1) DK0954373T3 (en)
EA (1) EA000959B1 (en)
EE (1) EE04709B1 (en)
ES (1) ES2216185T3 (en)
FR (1) FR2758094B1 (en)
GE (1) GEP20012491B (en)
HK (1) HK1023082A1 (en)
HU (1) HU222517B1 (en)
ID (1) ID22295A (en)
IL (1) IL130793A (en)
IS (1) IS5112A (en)
NO (1) NO320784B1 (en)
NZ (1) NZ336646A (en)
PE (1) PE15099A1 (en)
PL (1) PL186826B1 (en)
PT (1) PT954373E (en)
SK (1) SK285345B6 (en)
TR (1) TR199901607T2 (en)
UA (1) UA46884C2 (en)
WO (1) WO1998030319A1 (en)
YU (1) YU49448B (en)
ZA (1) ZA9866B (en)

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US6702949B2 (en) 1997-10-24 2004-03-09 Microdiffusion, Inc. Diffuser/emulsifier for aquaculture applications
US6386751B1 (en) 1997-10-24 2002-05-14 Diffusion Dynamics, Inc. Diffuser/emulsifier
JP2002035784A (en) * 2000-07-21 2002-02-05 Mitsui Mining Co Ltd Agitation and aeration apparatus
FR2823743B1 (en) * 2001-04-19 2004-03-12 Alain Boulant DEVICE FOR BREWING AND AERATING A LIQUID IN A TREATMENT TANK
FR2823742B1 (en) * 2001-04-19 2004-03-12 Alain Boulant DEVICE FOR BREWING AND AERATING A LIQUID IN A TREATMENT TANK
WO2003011774A1 (en) * 2001-07-28 2003-02-13 Moeller Gerhard Aerator for bodies of water
FR2839898B1 (en) * 2002-05-23 2004-08-13 Vor Environnement DEVICE FOR AERATION AND BREWING OF WASTEWATER IN A TREATMENT REACTOR, ITS USE FOR THE TREATMENT OF WASTEWATER AND ITS USE AS A FIRMER
US8445546B2 (en) 2006-10-25 2013-05-21 Revalesio Corporation Electrokinetically-altered fluids comprising charge-stabilized gas-containing nanostructures
US8597689B2 (en) 2006-10-25 2013-12-03 Revalesio Corporation Methods of wound care and treatment
CA2667634C (en) 2006-10-25 2016-07-12 Revalesio Corporation Mixing device and output fluids of same
JP4716039B2 (en) * 2007-05-15 2011-07-06 Ｊｆｅエンジニアリング株式会社 Rectangular stirred reaction tank
US10125359B2 (en) 2007-10-25 2018-11-13 Revalesio Corporation Compositions and methods for treating inflammation
US9523090B2 (en) 2007-10-25 2016-12-20 Revalesio Corporation Compositions and methods for treating inflammation
US9745567B2 (en) 2008-04-28 2017-08-29 Revalesio Corporation Compositions and methods for treating multiple sclerosis
WO2009134929A2 (en) 2008-05-01 2009-11-05 Revalesio Corporation Compositions and methods for treating digestive disorders
US20100058933A1 (en) * 2008-09-11 2010-03-11 Cheng Peter S Wine aerator
US8815292B2 (en) 2009-04-27 2014-08-26 Revalesio Corporation Compositions and methods for treating insulin resistance and diabetes mellitus
US8783637B2 (en) * 2010-04-19 2014-07-22 Cheese & Whey Systems, Inc. Temporary shaft support system
KR20130114581A (en) 2010-05-07 2013-10-18 레발레시오 코퍼레이션 Compositions and methods for enhancing physiological performance and recovery time
DE102010023832A1 (en) * 2010-06-10 2011-12-15 Sig Technology Ag Device and method for storing products
EP2603202A4 (en) 2010-08-12 2016-06-01 Revalesio Corp Compositions and methods for treatment of taupathy
TW201505705A (en) * 2013-05-01 2015-02-16 Invista Tech Sarl Reducing foaming in agitated autoclave during polymerization process
US20150076079A1 (en) * 2013-09-18 2015-03-19 Alstom Technology Ltd Method and system for seawter foam control
CN103952888B (en) * 2014-05-17 2015-12-16 杭州金拇指服装辅料有限公司 A kind of dye vat of nonwoven cloth dyeing assembly line
IT201800010022A1 (en) * 2018-11-05 2020-05-05 Giuseppe Chitarra OXIDATION PLANT FOR WASTEWATER
CN109569348B (en) * 2018-11-12 2021-03-05 大同新成新材料股份有限公司 Mixing device and method for lithium battery electrolyte production
CN110433719B (en) * 2019-07-25 2022-04-12 成都海蓉特种纺织品有限公司 Defoaming formula agitating unit
WO2022015843A1 (en) * 2020-07-14 2022-01-20 Jacobi Robert W Water and wastewater conditioning apparatus
CN113477111B (en) * 2021-07-27 2023-02-10 微纳气泡(浙江)智能科技有限公司 Gas dissolving device for pushing and pressurizing from inside to outside and using method

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* Cited by examiner, † Cited by third party
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MX169769B (en) * 1986-10-21 1993-07-26 Union Carbide Corp IMPROVED GAS-LIQUID MIXING
US5300261A (en) * 1992-11-12 1994-04-05 Richard Von Berg Liquid aerating apparatus
DE9302204U1 (en) * 1993-02-16 1993-07-15 Jüngling, Harry, 6466 Gründau Compact sewage treatment plant
FR2721229B1 (en) * 1994-06-16 1996-09-06 Cise Internationale Aeration and mixing device for a liquid such as greasy effluents.

Also Published As

Publication number Publication date
WO1998030319A1 (en) 1998-07-16
DK0954373T3 (en) 2004-07-26
UA46884C2 (en) 2002-06-17
CU22785A3 (en) 2002-07-24
CA2276760C (en) 2007-06-19
AU720825B2 (en) 2000-06-15
SK285345B6 (en) 2006-11-03
EP0954373B1 (en) 2004-04-28
HK1023082A1 (en) 2000-09-01
IL130793A (en) 2002-12-01
EP0954373A1 (en) 1999-11-10
HU222517B1 (en) 2003-08-28
SK91199A3 (en) 1999-12-10
GEP20012491B (en) 2001-07-25
AR011367A1 (en) 2000-08-16
ZA9866B (en) 1999-07-06
BG64414B1 (en) 2005-01-31
YU32199A (en) 2000-12-28
AU5770398A (en) 1998-08-03
PE15099A1 (en) 1999-05-14
CO4761080A1 (en) 1999-04-27
DE69728905D1 (en) 2004-06-03
EA000959B1 (en) 2000-08-28
KR20000069910A (en) 2000-11-25
CZ297858B6 (en) 2007-04-18
PL334630A1 (en) 2000-03-13
IS5112A (en) 1999-07-07
HUP0001223A3 (en) 2000-10-30
EE9900271A (en) 2000-02-15
DE69728905T2 (en) 2005-06-02
PT954373E (en) 2004-07-30
CZ238399A3 (en) 2000-01-12
NO320784B1 (en) 2006-01-30
ES2216185T3 (en) 2004-10-16
PL186826B1 (en) 2004-03-31
FR2758094B1 (en) 1999-03-26
IL130793A0 (en) 2001-01-28
ATE265263T1 (en) 2004-05-15
YU49448B (en) 2006-03-03
BG103583A (en) 2000-02-29
BR9714271A (en) 2000-04-18
NZ336646A (en) 2000-07-28
JP2001507623A (en) 2001-06-12
KR100488114B1 (en) 2005-05-09
HUP0001223A2 (en) 2000-08-28
CN1090050C (en) 2002-09-04
TR199901607T2 (en) 1999-11-22
CN1244135A (en) 2000-02-09
NO993330D0 (en) 1999-07-05
EA199900610A1 (en) 2000-04-24
FR2758094A1 (en) 1998-07-10
JP3651806B2 (en) 2005-05-25
EE04709B1 (en) 2006-10-16
ID22295A (en) 1999-09-30
CA2276760A1 (en) 1998-07-16

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