[go: up one dir, main page]

DK241388D0 - Fremgangsmaade og apparat til rensning af hulfiberfilter - Google Patents

Fremgangsmaade og apparat til rensning af hulfiberfilter

Info

Publication number
DK241388D0
DK241388D0 DK241388A DK241388A DK241388D0 DK 241388 D0 DK241388 D0 DK 241388D0 DK 241388 A DK241388 A DK 241388A DK 241388 A DK241388 A DK 241388A DK 241388 D0 DK241388 D0 DK 241388D0
Authority
DK
Denmark
Prior art keywords
fiber filter
cleaning air
air fiber
cleaning
filter
Prior art date
Application number
DK241388A
Other languages
English (en)
Other versions
DK241388A (da
Inventor
Douglas Lyons Ford
Noel Barton
Original Assignee
Memtec Ltd
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 Memtec Ltd filed Critical Memtec Ltd
Publication of DK241388D0 publication Critical patent/DK241388D0/da
Publication of DK241388A publication Critical patent/DK241388A/da

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02Membrane cleaning or sterilisation ; Membrane regeneration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14Ultrafiltration; Microfiltration
    • B01D61/145Ultrafiltration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14Ultrafiltration; Microfiltration
    • B01D61/22Controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2313/00Details relating to membrane modules or apparatus
    • B01D2313/48Mechanisms for switching between regular separation operations and washing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04Backflushing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16Use of chemical agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/18Use of gases

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
DK241388A 1986-09-04 1988-05-04 Fremgangsmaade og apparat til rensning af hulfiberfilter DK241388A (da)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPH784786 1986-09-04
AUPH992887 1987-01-19
PCT/AU1987/000301 WO1988001529A1 (en) 1986-09-04 1987-09-04 Cleaning of hollow fibre filters

Publications (2)

Publication Number Publication Date
DK241388D0 true DK241388D0 (da) 1988-05-04
DK241388A DK241388A (da) 1988-06-24

Family

ID=25643163

Family Applications (1)

Application Number Title Priority Date Filing Date
DK241388A DK241388A (da) 1986-09-04 1988-05-04 Fremgangsmaade og apparat til rensning af hulfiberfilter

Country Status (7)

Country Link
US (1) US4921610A (da)
EP (1) EP0280717A4 (da)
JP (1) JPH01501046A (da)
AU (1) AU605187B2 (da)
DK (1) DK241388A (da)
NO (1) NO177218C (da)
WO (1) WO1988001529A1 (da)

Families Citing this family (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE460639B (sv) * 1987-08-31 1989-11-06 Gambro Dialysatoren Anordning foer diffusion och/eller filtrering samt foerfarande foer framstaellning av densamma
FR2665086B1 (fr) * 1990-07-30 1992-12-18 Lorraine Carbone Procede et dispositif de decolmatage en microfiltration tangentielle.
FR2666245B1 (fr) * 1990-08-31 1992-10-23 Lyonnaise Eaux Procede de commande des modes de fonctionnement d'un appareil automatique de filtration d'eau sur membranes tubulaires.
FR2668078B1 (fr) * 1990-10-17 1992-12-24 Dumez Lyonnaise Eaux Procede pour le retrolavage de membrane tubulaires de filtration, et dispositif de mise en óoeuvre.
US5198116A (en) * 1992-02-10 1993-03-30 D.W. Walker & Associates Method and apparatus for measuring the fouling potential of membrane system feeds
DE4209588C2 (de) * 1992-03-25 1995-02-02 Guetling Gmbh Ölabscheider mit integrierter Mikrofiltrations-Einrichtung und Verfahren zu ihrer Reinigung
US5403489A (en) * 1993-06-24 1995-04-04 Minnesota Mining And Manufacturing Company Solid phase extraction method and apparatus
US5403479A (en) * 1993-12-20 1995-04-04 Zenon Environmental Inc. In situ cleaning system for fouled membranes
JPH07236818A (ja) * 1994-02-25 1995-09-12 Dick Deguremon Kk 内圧式中空糸モジュールの逆洗方法
FR2723002B1 (fr) * 1994-07-26 1996-09-06 Hospal Ind Dispositif et procede pour preparer un liquide de traitement par filtration
AUPM800694A0 (en) * 1994-09-09 1994-10-06 Memtec Limited Cleaning of hollow fibre membranes
US5505854A (en) * 1994-09-09 1996-04-09 Electric Power Research Institute Two continuous filtration system for supplying filtrate to automatic analyzers
NZ303096A (en) * 1995-03-15 1999-01-28 Memtec America Corp Method and apparatus for determining the potential fouling effect of a feedstream by passing sample through filter of known properties
US6077435A (en) * 1996-03-15 2000-06-20 Usf Filtration And Separations Group Inc. Filtration monitoring and control system
US5958243A (en) * 1996-07-11 1999-09-28 Zenon Environmental Inc. Apparatus and method for membrane filtration with enhanced net flux
US5888401A (en) * 1996-09-16 1999-03-30 Union Camp Corporation Method and apparatus for reducing membrane fouling
US20040232076A1 (en) * 1996-12-20 2004-11-25 Fufang Zha Scouring method
ES2353254T3 (es) 1996-12-20 2011-02-28 Siemens Water Technologies Corp. Procedimiento de lavado.
US6120688A (en) * 1997-02-25 2000-09-19 Zenon Environmental, Inc. Portable reverse osmosis unit for producing drinking water
US6641733B2 (en) * 1998-09-25 2003-11-04 U. S. Filter Wastewater Group, Inc. Apparatus and method for cleaning membrane filtration modules
US6402954B1 (en) * 1997-12-01 2002-06-11 O'keefe, Jr. Patrick J. Method and apparatus for monitoring and cleaning a fluid filter system
US6074551A (en) * 1998-04-30 2000-06-13 Culligan Water Conditioning Of Fairfield County Automatic cleaning system for a reverse osmosis unit in a high purity water treatment system
EP0989404B1 (de) * 1998-09-23 2008-06-25 WTW Wissenschaftlich-Technische Werkstätten GmbH & Co. KG Wasser- und Abwasseranalysevorrichtung
TWI222895B (en) 1998-09-25 2004-11-01 Usf Filtration & Separations Apparatus and method for cleaning membrane filtration modules
US6322703B1 (en) 1999-04-20 2001-11-27 Asahi Kasei Kabushiki Kaisha Method for purifying aqueous suspension
AUPP985099A0 (en) * 1999-04-20 1999-05-13 Usf Filtration And Separations Group Inc. Membrane filtration manifold system
US6168714B1 (en) * 1999-05-17 2001-01-02 North Carolina A&T University Flux-enhanced cross-flow membrane filter
US6627082B2 (en) * 1999-06-10 2003-09-30 Envirogen, Inc. System and method for withdrawing permeate through a filter and for cleaning the filter in situ
US6331251B1 (en) * 1999-06-10 2001-12-18 Envirogen, Inc. System and method for withdrawing permeate through a filter and for cleaning the filter in situ
US20050178729A1 (en) * 1999-07-30 2005-08-18 Rabie Hamid R. Maintenance cleaning for membranes
US6589426B1 (en) * 1999-09-29 2003-07-08 Zenon Environmental Inc. Ultrafiltration and microfiltration module and system
AUPQ680100A0 (en) * 2000-04-10 2000-05-11 Usf Filtration And Separations Group Inc. Hollow fibre restraining system
AUPR064800A0 (en) * 2000-10-09 2000-11-02 Usf Filtration And Separations Group Inc. Improved membrane filtration system
AUPR094600A0 (en) * 2000-10-23 2000-11-16 Usf Filtration And Separations Group Inc. Fibre membrane arrangement
AUPR143400A0 (en) * 2000-11-13 2000-12-07 Usf Filtration And Separations Group Inc. Modified membranes
FR2817768B1 (fr) * 2000-12-13 2003-08-29 Lyonnaise Eaux Eclairage Procede de regulation d'une installation de filtration sur membranes
AUPR421501A0 (en) * 2001-04-04 2001-05-03 U.S. Filter Wastewater Group, Inc. Potting method
AUPR584301A0 (en) * 2001-06-20 2001-07-12 U.S. Filter Wastewater Group, Inc. Membrane polymer compositions
AUPR692401A0 (en) 2001-08-09 2001-08-30 U.S. Filter Wastewater Group, Inc. Method of cleaning membrane modules
AUPR774201A0 (en) * 2001-09-18 2001-10-11 U.S. Filter Wastewater Group, Inc. High solids module
ATE333318T1 (de) * 2001-11-16 2006-08-15 Us Filter Wastewater Group Inc Methode zur reinigung von membranen
SE521186C2 (sv) * 2001-11-30 2003-10-07 Tetra Laval Holdings & Finance Förfarande och anordning för testning av rengöringseffektivitet för ett filter i ett filtersystem
WO2003059495A1 (en) * 2002-01-09 2003-07-24 Hydranautics Methods for improving filtration performance of hollow fiber membranes
KR100421052B1 (ko) * 2002-01-24 2004-03-04 삼성전자주식회사 탈이온수 제조 장치 및 그 사용 방법
US7247238B2 (en) * 2002-02-12 2007-07-24 Siemens Water Technologies Corp. Poly(ethylene chlorotrifluoroethylene) membranes
AUPS300602A0 (en) 2002-06-18 2002-07-11 U.S. Filter Wastewater Group, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
TWI296205B (en) * 2002-09-27 2008-05-01 Mitsubishi Rayon Co Hollow fiber membrane module, hollow fiber membrane module unit, membrane filtering device using the same, and operating method thereof
US7938966B2 (en) 2002-10-10 2011-05-10 Siemens Water Technologies Corp. Backwash method
AU2002953111A0 (en) 2002-12-05 2002-12-19 U. S. Filter Wastewater Group, Inc. Mixing chamber
US6984331B2 (en) * 2003-05-14 2006-01-10 Steris Inc. Filter cleaning and decontaminating system
AU2003903507A0 (en) * 2003-07-08 2003-07-24 U. S. Filter Wastewater Group, Inc. Membrane post-treatment
CA2535360C (en) 2003-08-29 2013-02-12 U.S. Filter Wastewater Group, Inc. Backwash
CA2544626C (en) 2003-11-14 2016-01-26 U.S. Filter Wastewater Group, Inc. Closed aeration and backwash device for use with membrane filtration module
ATE457819T1 (de) * 2003-12-07 2010-03-15 Univ Ben Gurion Verfahren und system zur verbesserung der rückgewinnung und verhinderung der bildung von ablagerungen durch fällung bei druckgetriebenen membranverfahren
US20050194315A1 (en) * 2004-02-27 2005-09-08 Adams Nicholas W.H. Membrane batch filtration process
KR100453329B1 (ko) * 2004-03-08 2004-10-21 주식회사 나노엔텍 밀도 조절형 섬유사 정밀여과장치
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
WO2005107929A2 (en) 2004-04-22 2005-11-17 Siemens Water Technologies Corp. Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials
CA2571498A1 (en) * 2004-07-02 2006-01-12 U.S. Filter Wastewater Group, Inc. Gas transfer membrane
ATE523240T1 (de) 2004-07-05 2011-09-15 Siemens Water Tech Corp Hydrophile membranen
US7410587B2 (en) * 2004-08-03 2008-08-12 Scilog, Inc. Liquid handling for filtration and preparative chromatography
WO2006017911A1 (en) 2004-08-20 2006-02-23 Siemens Water Technologies Corp. Square mbr manifolding system
CA2579168C (en) 2004-09-07 2015-06-23 Siemens Water Technologies Corp. Membrane filtration with reduced volume cleaning step
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
CN100548452C (zh) 2004-09-15 2009-10-14 西门子水技术公司 一种薄膜过滤系统以及控制薄膜过滤系统中积垢的方法
ATE511915T1 (de) * 2004-12-03 2011-06-15 Siemens Industry Inc Membrannachbehandlung
JP4763718B2 (ja) 2004-12-24 2011-08-31 シーメンス・ウォーター・テクノロジーズ・コーポレーション 膜濾過システムの洗浄
NZ555987A (en) 2004-12-24 2009-08-28 Siemens Water Tech Corp Simple gas scouring method and apparatus
US20060266705A1 (en) * 2005-04-22 2006-11-30 Arnold Janson Refreshing chemicals during membrane cleaning
JP2008539054A (ja) 2005-04-29 2008-11-13 シーメンス・ウォーター・テクノロジーズ・コーポレイション 膜フィルターのための化学洗浄
US20080214687A1 (en) * 2005-06-20 2008-09-04 Heinz-Joachim Muller Cross Linking Treatment of Polymer Membranes
EP3189885A1 (en) 2005-07-12 2017-07-12 Zenon Technology Partnership Process control for an immersed membrane system
CA2614498A1 (en) 2005-07-14 2007-01-18 Siemens Water Technologies Corp. Monopersulfate treatment of membranes
SG140229A1 (en) 2005-08-22 2008-03-28 Siemens Water Tech Corp An assembly for water filtration using a tube manifold to minimise backwash
WO2007044415A2 (en) 2005-10-05 2007-04-19 Siemens Water Technologies Corp. Method and apparatus for treating wastewater
SG168522A1 (en) * 2006-01-12 2011-02-28 Siemens Water Tech Corp Improved operating strategies in filtration processes
US20110059462A1 (en) * 2006-02-21 2011-03-10 University Of South Florida Automated particulate concentration system
WO2008051546A2 (en) 2006-10-24 2008-05-02 Siemens Water Technologies Corp. Infiltration/inflow control for membrane bioreactor
CA2682707C (en) 2007-04-02 2014-07-15 Siemens Water Technologies Corp. Improved infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
CN100556798C (zh) * 2007-04-27 2009-11-04 华中科技大学 透析分离纯化法制备钙磷生物材料的生产装置
KR20130135980A (ko) 2007-05-29 2013-12-11 지멘스 인더스트리 인코포레이티드 펄스형 공기리프트 펌프를 이용한 막 세정 방법 및 장치
NL2000799C2 (nl) * 2007-08-08 2009-02-10 Prime Water Internat N V Inrichting voor het filtreren van verontreinigd water.
US7895084B2 (en) * 2008-05-15 2011-02-22 Doapp, Inc. Method and system for providing purchasing on a wireless device
AU2009273775B2 (en) 2008-07-24 2014-11-20 Evoqua Water Technologies Llc Frame system for membrane filtration modules
CA2734796A1 (en) 2008-08-20 2010-02-25 Siemens Water Technologies Corp. Improved membrane system backwash energy efficiency
AU2010257526A1 (en) 2009-06-11 2012-01-12 Siemens Industry, Inc Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane
US9314742B2 (en) 2010-03-31 2016-04-19 Toyota Motor Engineering & Manufacturing North America, Inc. Method and system for reverse osmosis predictive maintenance using normalization data
US8221628B2 (en) 2010-04-08 2012-07-17 Toyota Motor Engineering & Manufacturing North America, Inc. Method and system to recover waste heat to preheat feed water for a reverse osmosis unit
EP2563501B1 (en) 2010-04-30 2019-05-15 Evoqua Water Technologies LLC Fluid flow distribution device
WO2012040412A1 (en) 2010-09-24 2012-03-29 Siemens Industry, Inc. Fluid control manifold for membrane filtration system
US8505324B2 (en) 2010-10-25 2013-08-13 Toyota Motor Engineering & Manufacturing North America, Inc. Independent free cooling system
CN103501879B (zh) 2011-04-25 2016-12-07 日本碍子株式会社 陶瓷过滤器的清洗方法
KR101964484B1 (ko) 2011-09-30 2019-04-01 에보쿠아 워터 테크놀로지스 엘엘씨 개선된 매니폴드 배열
HUE058060T2 (hu) 2011-09-30 2022-07-28 Rohm & Haas Electronic Mat Szigetelõ szelep
WO2014004645A1 (en) 2012-06-28 2014-01-03 Siemens Industry, Inc. A potting method
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
AU2013101765A4 (en) 2012-09-27 2016-10-13 Evoqua Water Technologies Llc Gas Scouring Apparatus for Immersed Membranes
EP2745916B1 (en) * 2012-12-18 2018-01-24 Grundfos Holding A/S Method of cleaning a liquid fluid filter
WO2015050764A1 (en) 2013-10-02 2015-04-09 Evoqua Water Technologies Llc A method and device for repairing a membrane filtration module
WO2016117081A1 (ja) * 2015-01-22 2016-07-28 株式会社クボタ 管状ろ過膜の洗浄方法
US10214430B2 (en) 2015-03-04 2019-02-26 Israel Aerospace Industries Ltd. Water treatment system and method
AU2016294153B2 (en) 2015-07-14 2022-01-20 Evoqua Water Technologies Llc Aeration device for filtration system
JP6960791B2 (ja) * 2017-07-19 2021-11-05 株式会社クラレ 中空糸膜濾過装置の洗浄方法及び中空糸膜濾過装置
RU2686199C1 (ru) * 2018-09-27 2019-04-24 Общество С Ограниченной Ответственностью "Аквафор" (Ооо "Аквафор") Система очистки жидкости

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2457844C3 (de) * 1974-12-06 1978-06-08 Vadim Petrovitsch Abramov Steuervorrichtung für periodisch arbeitende Filter
US4332264A (en) * 1980-03-03 1982-06-01 United Healthcare Association Automated cleaning system for dialyzers
DE3116610C2 (de) * 1981-04-27 1986-06-19 Ruslan Ivanovič Batyrev Verfahren zur Steuerung einer Filteranlage
US4414113A (en) * 1982-09-29 1983-11-08 Ecodyne Corporation Liquid purification using reverse osmosis hollow fibers
EP0160014B1 (en) * 1983-09-30 1993-01-07 Memtec Limited Cleaning of filters
AT381645B (de) * 1984-08-30 1986-11-10 Frings & Co Heinrich Verfahren und vorrichtung zur langzeit-ultrafiltration einer fluessigkeit
JPS61119276A (ja) * 1984-11-14 1986-06-06 株式会社 ニツシヨ− 限外濾過量制御装置
ATE79300T1 (de) * 1984-11-15 1992-08-15 Baxter Int Anpassungsfaehiges kontrollsystem und -methode fuer die stroemung von filterkonzentrat.
ATE81796T1 (de) * 1985-03-05 1992-11-15 Memtec Ltd Konzentrierung von feststoffen in einer suspension.
FR2586202B1 (fr) * 1985-08-13 1989-11-17 Meridional Oenologie Centre Procedes et dispositifs de decolmatage en marche d'un filtre tangentiel

Also Published As

Publication number Publication date
NO881925D0 (no) 1988-05-03
AU7963787A (en) 1988-03-24
DK241388A (da) 1988-06-24
EP0280717A4 (en) 1988-10-24
NO177218C (no) 1995-08-09
EP0280717A1 (en) 1988-09-07
WO1988001529A1 (en) 1988-03-10
AU605187B2 (en) 1991-01-10
NO177218B (no) 1995-05-02
JPH01501046A (ja) 1989-04-13
NO881925L (no) 1988-06-28
US4921610A (en) 1990-05-01

Similar Documents

Publication Publication Date Title
DK241388A (da) Fremgangsmaade og apparat til rensning af hulfiberfilter
DK461487D0 (da) Fremgangsmaade og apparat til rensning af roeggas.
DK418188D0 (da) Fremgangsmaade og apparat til rensning af spildgasser eller spildluft
DK398586D0 (da) Fremgangsmaade og apparat til rensning af afgangsluft
DK270487A (da) Fremgangsmaade og apparat til fremstilling af mandelmasse
DK259189D0 (da) Fremgangsmaade og apparat til fremstilling af mikrokapsler
DK630387A (da) Fremgangsmaade og apparat til fremstilling af fyldstofholdigt papir
DK312886A (da) Fremgangsmaade og apparat til rensning af hydrogen
DK471381A (da) Fremgangsmaade og apparat til rengoering af bassiner
DK269382A (da) Fremgangsmaade og apparat til fremstilling af cigaretfiltre
DK674688A (da) Fremgangsmaade og apparat til brygning af filtreret kaffe
DK152963C (da) Apparat til rengoering af taepper og lignende
DK336583D0 (da) Fremgangsmade og apparat til fremstilling af persienner
DK378388D0 (da) Fremgangsmaade og apparat til fremstilling af pyramidestubformede daaseemner
DK300589D0 (da) Fremgangsmaade og apparat til fremstilling af lynlaase
DK156889A (da) Fremgangsmaade og apparat til rensning af jordlag
NO840358L (no) Fremgangsmaate og apparat til vasking av tremassefibre
DK419088D0 (da) Fremgangsmaade og apparat til fremstilling af vekselspaending
DK458288A (da) Fremgangsmaade og apparat til maaling af loddemiddeltykkelse
NO862530D0 (no) Fremgangsmaate og apparat til rengjoering av filterelementer
DK295087A (da) Fremgangsmaade og apparat til oparbejdning af saagods
NO169668C (no) Fremgangsmaate og apparat for elektroplettering av fibre
DK81389D0 (da) Fremgangsmaade og apparat til separering af bakterier
NO844187L (no) Fremgangsmaate og anordning for fremstilling av fibermasse
DK163490D0 (da) Fremgangsmaade og apparat til halsskindrensning af slagtet fjerkrae

Legal Events

Date Code Title Description
AHS Application shelved for other reasons than non-payment