DE69317700D1 - Verfahren zur Herstellung von Elektrode-Anordnungen - Google Patents
Verfahren zur Herstellung von Elektrode-AnordnungenInfo
- Publication number
- DE69317700D1 DE69317700D1 DE69317700T DE69317700T DE69317700D1 DE 69317700 D1 DE69317700 D1 DE 69317700D1 DE 69317700 T DE69317700 T DE 69317700T DE 69317700 T DE69317700 T DE 69317700T DE 69317700 D1 DE69317700 D1 DE 69317700D1
- Authority
- DE
- Germany
- Prior art keywords
- electrode
- precious metal
- particulate carbon
- production
- electrode assembly
- 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.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8828—Coating with slurry or ink
- H01M4/8835—Screen printing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8828—Coating with slurry or ink
- H01M4/8839—Painting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8846—Impregnation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
- H01M4/8882—Heat treatment, e.g. drying, baking
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
- H01M4/8892—Impregnation or coating of the catalyst layer, e.g. by an ionomer
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inert Electrodes (AREA)
- Electrodes Of Semiconductors (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Catalysts (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Thermistors And Varistors (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929213124A GB9213124D0 (en) | 1992-06-20 | 1992-06-20 | High performance electrode |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69317700D1 true DE69317700D1 (de) | 1998-05-07 |
DE69317700T2 DE69317700T2 (de) | 1998-08-20 |
Family
ID=10717443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69317700T Expired - Fee Related DE69317700T2 (de) | 1992-06-20 | 1993-06-16 | Verfahren zur Herstellung von Elektrode-Anordnungen |
Country Status (10)
Country | Link |
---|---|
US (1) | US5501915A (de) |
EP (1) | EP0577291B1 (de) |
JP (1) | JP3211997B2 (de) |
AT (1) | ATE164705T1 (de) |
AU (1) | AU664620B2 (de) |
CA (1) | CA2098800C (de) |
DE (1) | DE69317700T2 (de) |
DK (1) | DK0577291T3 (de) |
ES (1) | ES2114005T3 (de) |
GB (1) | GB9213124D0 (de) |
Families Citing this family (78)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3422377B2 (ja) * | 1993-08-06 | 2003-06-30 | 松下電器産業株式会社 | 固体高分子型燃料電池の製造方法及びこれにより得られる固体高分子型燃料電池 |
WO1995015016A1 (en) * | 1993-11-29 | 1995-06-01 | International Fuel Cells Corporation | Cell/membrane and electrode assembly for electrochemical cells |
JP3712768B2 (ja) * | 1995-01-26 | 2005-11-02 | 松下電器産業株式会社 | 固体高分子型燃料電池の製造法 |
GB9504713D0 (en) * | 1995-03-09 | 1995-04-26 | Johnson Matthey Plc | Improved electrocatalytic material |
US6312845B1 (en) | 1995-10-06 | 2001-11-06 | The Dow Chemical Company | Macroporous flow field assembly |
US5702755A (en) * | 1995-11-06 | 1997-12-30 | The Dow Chemical Company | Process for preparing a membrane/electrode assembly |
CN1201554A (zh) * | 1995-10-06 | 1998-12-09 | 陶氏化学公司 | 燃料电池的薄膜电极组件用的流场结构 |
DE19544323A1 (de) * | 1995-11-28 | 1997-06-05 | Magnet Motor Gmbh | Gasdiffusionselektrode für Polymerelektrolytmembran-Brennstoffzellen |
US6183898B1 (en) | 1995-11-28 | 2001-02-06 | Hoescht Research & Technology Deutschland Gmbh & Co. Kg | Gas diffusion electrode for polymer electrolyte membrane fuel cells |
US5672439A (en) | 1995-12-18 | 1997-09-30 | Ballard Power Systems, Inc. | Method and apparatus for reducing reactant crossover in an electrochemical fuel cell |
US5882810A (en) * | 1996-03-08 | 1999-03-16 | The Dow Chemicalcompany | Active layer for membrane electrode assembly |
US6103393A (en) * | 1998-02-24 | 2000-08-15 | Superior Micropowders Llc | Metal-carbon composite powders, methods for producing powders and devices fabricated from same |
US6660680B1 (en) | 1997-02-24 | 2003-12-09 | Superior Micropowders, Llc | Electrocatalyst powders, methods for producing powders and devices fabricated from same |
US6338809B1 (en) * | 1997-02-24 | 2002-01-15 | Superior Micropowders Llc | Aerosol method and apparatus, particulate products, and electronic devices made therefrom |
US6780350B1 (en) | 1997-02-24 | 2004-08-24 | Superior Micropowders Llc | Metal-carbon composite powders, methods for producing powders and devices fabricated from same |
JP3773325B2 (ja) * | 1997-03-17 | 2006-05-10 | ジャパンゴアテックス株式会社 | 高分子固体電解質燃料電池用ガス拡散層材料及びその接合体 |
US5910378A (en) | 1997-10-10 | 1999-06-08 | Minnesota Mining And Manufacturing Company | Membrane electrode assemblies |
JP3929146B2 (ja) * | 1997-11-07 | 2007-06-13 | 松下電器産業株式会社 | 固体高分子型燃料電池システム |
US6967183B2 (en) * | 1998-08-27 | 2005-11-22 | Cabot Corporation | Electrocatalyst powders, methods for producing powders and devices fabricated from same |
US6753108B1 (en) * | 1998-02-24 | 2004-06-22 | Superior Micropowders, Llc | Energy devices and methods for the fabrication of energy devices |
US7517606B2 (en) * | 1998-02-24 | 2009-04-14 | Cabot Corporation | Fuel cells and batteries including metal-carbon composite powders |
US7138354B2 (en) * | 1998-02-24 | 2006-11-21 | Cabot Corporation | Method for the fabrication of an electrocatalyst layer |
US6548202B2 (en) | 1998-03-06 | 2003-04-15 | Ballard Power System, Inc. | Carbon-supported catalysts for fuel cells |
US6074773A (en) * | 1998-03-06 | 2000-06-13 | Ballard Power Systems Inc. | Impregnation of microporous electrocatalyst particles for improving performance in an electrochemical fuel cell |
DE19812592B4 (de) * | 1998-03-23 | 2004-05-13 | Umicore Ag & Co.Kg | Membran-Elektroden-Einheit für Polymer-Elektrolyt-Brennstoffzellen, Verfahren zu ihrer Herstellung sowie Tinte |
EP0952241B1 (de) * | 1998-04-23 | 2001-09-05 | N.E. Chemcat Corporation | Pt-Ru Elektrokatalysator auf Träger, sowie diesen enthaltende Elektrode, MEA und Festelektrolyt-Brennstoffzelle |
US7098163B2 (en) * | 1998-08-27 | 2006-08-29 | Cabot Corporation | Method of producing membrane electrode assemblies for use in proton exchange membrane and direct methanol fuel cells |
US7255954B2 (en) * | 1998-08-27 | 2007-08-14 | Cabot Corporation | Energy devices |
CN1134556C (zh) * | 1998-11-12 | 2004-01-14 | 古屋长一 | 气体扩散电极原料、其制备方法及气体扩散电极的制作方法 |
FR2788630B1 (fr) * | 1999-01-14 | 2001-08-03 | Sorapec | Structure pour couche active d'electrodes de piles a combustible a electrolyte solide polymere |
US6403245B1 (en) * | 1999-05-21 | 2002-06-11 | Microcoating Technologies, Inc. | Materials and processes for providing fuel cells and active membranes |
EP1222707A2 (de) * | 1999-09-09 | 2002-07-17 | Danish Power Systems APS | Polymer-elektrolyt-membran brennstoffzelle |
KR100437293B1 (ko) * | 1999-09-21 | 2004-06-25 | 마쯔시다덴기산교 가부시키가이샤 | 고분자 전해질형 연료전지 및 그 제조방법 |
DE10085305T1 (de) * | 1999-12-17 | 2002-11-21 | Int Fuel Cells Llc | Brennstoffzelle mit einer hydrophilen Substratschicht |
US6780533B2 (en) | 1999-12-17 | 2004-08-24 | Utc Fuel Cells, Llc | Fuel cell having interdigitated flow channels and water transport plates |
JP2001216991A (ja) | 2000-02-02 | 2001-08-10 | Toyota Motor Corp | 燃料電池性能評価装置およびその評価方法、燃料電池用電極触媒の比表面積評価装置およびその評価方法、並びに燃料電池用電極触媒およびその製造方法 |
US6602630B1 (en) | 2000-03-14 | 2003-08-05 | The Electrosynthesis Company, Inc. | Membrane electrode assemblies for electrochemical cells |
US7507687B2 (en) * | 2000-03-22 | 2009-03-24 | Cabot Corporation | Electrocatalyst powders, methods for producing powder and devices fabricated from same |
WO2001094450A2 (en) * | 2000-06-02 | 2001-12-13 | Sri International | Polymer membrane composition |
FR2810794A1 (fr) * | 2000-06-26 | 2001-12-28 | Sorapec | Association d'electrodes et de membrane comportant des conducteurs protoniques |
DE10037072A1 (de) * | 2000-07-29 | 2002-02-14 | Omg Ag & Co Kg | Membran-Elektrodeneinheit für Polymerelektrolyt-Brennstoffzellen und Verfahren zu ihrer Herstellung |
JP2004536419A (ja) * | 2000-11-30 | 2004-12-02 | エムティーアイ・マイクロフューエル・セルズ・インコーポレイテッド | 燃料電池膜および一体化されたガス分離を有するシステム |
US7541308B2 (en) * | 2001-04-11 | 2009-06-02 | Cabot Corporation | Fuel cells and other products containing modified carbon products |
US7316855B2 (en) * | 2001-06-01 | 2008-01-08 | Polyfuel, Inc. | Fuel cell assembly for portable electronic device and interface, control, and regulator circuit for fuel cell powered electronic device |
EP1393400B1 (de) * | 2001-06-01 | 2008-07-09 | Polyfuel, Inc. | Austauschbare Brennstoffpatrone, Brennstoffzellenaggregat mit besagter Brennstoffpatrone für tragbare elektronische Geräte und entsprechendes Gerät |
US6921593B2 (en) * | 2001-09-28 | 2005-07-26 | Hewlett-Packard Development Company, L.P. | Fuel additives for fuel cell |
US6465041B1 (en) * | 2001-12-19 | 2002-10-15 | 3M Innovative Properties Company | Method of making gas diffusion layers for electrochemical cells |
KR100436712B1 (ko) * | 2001-12-19 | 2004-06-22 | 삼성에스디아이 주식회사 | 캐소드 전극, 그 제조방법 및 이를 채용한 리튬 전지 |
GB0200253D0 (en) * | 2002-01-08 | 2002-02-20 | Johnson Matthey Plc | Improved material for electrode manufacture |
US6730424B1 (en) | 2002-03-14 | 2004-05-04 | H Power Corporation | Electrochemical method to improve the performance of H2/air PEM fuel cells and direct methanol fuel cells |
DE10211177A1 (de) * | 2002-03-14 | 2003-10-02 | Daimler Chrysler Ag | Membran-Elektroden-Einheit |
JP2003317729A (ja) * | 2002-04-26 | 2003-11-07 | Ube Ind Ltd | 多孔質黒鉛フィルムを用いた燃料電池用電極、膜−電極接合体及び燃料電池 |
GB0212636D0 (en) * | 2002-05-31 | 2002-07-10 | Johnson Matthey Plc | Electrode |
AU2003298806A1 (en) * | 2002-12-02 | 2004-06-23 | Polyfuel, Inc. | Fuel cell cartridge for portable electronic device |
JP4266624B2 (ja) * | 2002-12-02 | 2009-05-20 | 三洋電機株式会社 | 燃料電池用電極および燃料電池 |
US7501050B2 (en) * | 2002-12-31 | 2009-03-10 | Northern Illinois University | Method of making metal-coated carbon surfaces for use in fuel cells |
WO2004079848A2 (en) * | 2003-03-03 | 2004-09-16 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | Novel electrode with switchable and tunable power output and fuel cell using such electrode |
US7396611B2 (en) * | 2003-12-15 | 2008-07-08 | Plug Power Inc. | Fuel cell catalyst layer |
US7291419B2 (en) | 2004-01-22 | 2007-11-06 | General Motors Corporation | Durable membrane electrode assembly catalyst coated diffusion media with no lamination to membrane |
US20050233203A1 (en) * | 2004-03-15 | 2005-10-20 | Hampden-Smith Mark J | Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same |
KR100953545B1 (ko) * | 2004-03-23 | 2010-04-21 | 삼성에스디아이 주식회사 | 담지촉매 및 그 제조 방법 |
DE102004035309A1 (de) * | 2004-07-21 | 2006-02-16 | Pemeas Gmbh | Membran-Elektrodeneinheiten und Brennstoffzellen mit erhöhter Lebensdauer |
US7816007B2 (en) * | 2004-10-28 | 2010-10-19 | Mitsubishi Chemical Corporation | Spherical carbon particles and their aggregates |
JP2006164790A (ja) * | 2004-12-08 | 2006-06-22 | Nissan Motor Co Ltd | 燃料電池用触媒層の形成装置及び燃料電池用触媒層の形成方法 |
US20060237034A1 (en) * | 2005-04-20 | 2006-10-26 | Lawrence Shore | Process for recycling components of a PEM fuel cell membrane electrode assembly |
WO2006138282A2 (en) * | 2005-06-13 | 2006-12-28 | Enerage, Inc. | Supported metal electrocatalyst materials and the method for forming the same |
US20070160899A1 (en) * | 2006-01-10 | 2007-07-12 | Cabot Corporation | Alloy catalyst compositions and processes for making and using same |
JP5223127B2 (ja) * | 2006-04-27 | 2013-06-26 | 国立大学法人山梨大学 | ガス拡散電極の製造方法 |
US8124261B2 (en) * | 2006-06-20 | 2012-02-28 | Basf Corporation | Process for recycling components of a PEM fuel cell membrane electrode assembly |
US20090215615A1 (en) * | 2006-07-11 | 2009-08-27 | 3M Innovative Properties Company | Method of forming supported nanoparticle catalysts |
CN100527494C (zh) * | 2006-09-15 | 2009-08-12 | 新源动力股份有限公司 | 低温燃料电池电极用ptfe/c复合粉体及应用 |
WO2008138396A1 (en) * | 2007-05-15 | 2008-11-20 | Acta S.P.A. | Vapor fed direct hydrocarbon alkaline fuel cells |
CN102007628A (zh) * | 2008-02-08 | 2011-04-06 | 莫纳什大学 | 用于电化学电池的电极 |
US8206569B2 (en) | 2009-02-04 | 2012-06-26 | Applied Materials, Inc. | Porous three dimensional copper, tin, copper-tin, copper-tin-cobalt, and copper-tin-cobalt-titanium electrodes for batteries and ultra capacitors |
US20100203391A1 (en) * | 2009-02-09 | 2010-08-12 | Applied Materials, Inc. | Mesoporous carbon material for energy storage |
US20100316931A1 (en) * | 2009-06-10 | 2010-12-16 | Friedrich Wilhelm Wieland | Electrocatalyst, Fuel Cell Cathode and Fuel Cell |
US20140356761A1 (en) | 2011-08-11 | 2014-12-04 | Amalyst Limited | Catalysts |
GB201121898D0 (en) | 2011-12-20 | 2012-02-01 | Ucl Business Plc | Fuel cell |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404312A1 (fr) * | 1977-09-27 | 1979-04-20 | Anvar | Electrode a gaz pour pile a combustible |
EP0241432B1 (de) * | 1986-03-07 | 1993-08-11 | Tanaka Kikinzoku Kogyo K.K. | Gasdurchlässige Elektrode |
US4816431A (en) * | 1986-04-03 | 1989-03-28 | Nagakazu Furuya | Process for preparing materials for reaction layer of gas permeable electrode |
US4876115A (en) * | 1987-01-30 | 1989-10-24 | United States Department Of Energy | Electrode assembly for use in a solid polymer electrolyte fuel cell |
US4975172A (en) * | 1987-03-02 | 1990-12-04 | Westinghouse Electric Corp. | Ionomeric polymers with ionomer membrane in pressure tolerant gas diffusion electrodes |
US4877694A (en) * | 1987-05-18 | 1989-10-31 | Eltech Systems Corporation | Gas diffusion electrode |
US4804592A (en) * | 1987-10-16 | 1989-02-14 | The United States Of America As Represented By The United States Department Of Energy | Composite electrode for use in electrochemical cells |
US5084144A (en) * | 1990-07-31 | 1992-01-28 | Physical Sciences Inc. | High utilization supported catalytic metal-containing gas-diffusion electrode, process for making it, and cells utilizing it |
JPH04162365A (ja) * | 1990-10-25 | 1992-06-05 | Tanaka Kikinzoku Kogyo Kk | 燃料電池用電極の作製法 |
-
1992
- 1992-06-20 GB GB929213124A patent/GB9213124D0/en active Pending
-
1993
- 1993-06-16 ES ES93304687T patent/ES2114005T3/es not_active Expired - Lifetime
- 1993-06-16 AT AT93304687T patent/ATE164705T1/de not_active IP Right Cessation
- 1993-06-16 DE DE69317700T patent/DE69317700T2/de not_active Expired - Fee Related
- 1993-06-16 DK DK93304687T patent/DK0577291T3/da active
- 1993-06-16 EP EP93304687A patent/EP0577291B1/de not_active Expired - Lifetime
- 1993-06-18 AU AU41372/93A patent/AU664620B2/en not_active Ceased
- 1993-06-18 JP JP14756693A patent/JP3211997B2/ja not_active Expired - Lifetime
- 1993-06-18 CA CA002098800A patent/CA2098800C/en not_active Expired - Fee Related
-
1995
- 1995-04-26 US US08/429,460 patent/US5501915A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DK0577291T3 (da) | 1999-02-01 |
CA2098800A1 (en) | 1993-12-21 |
EP0577291B1 (de) | 1998-04-01 |
JPH0652862A (ja) | 1994-02-25 |
AU664620B2 (en) | 1995-11-23 |
JP3211997B2 (ja) | 2001-09-25 |
AU4137293A (en) | 1993-12-23 |
ATE164705T1 (de) | 1998-04-15 |
GB9213124D0 (en) | 1992-08-05 |
ES2114005T3 (es) | 1998-05-16 |
CA2098800C (en) | 2004-01-13 |
DE69317700T2 (de) | 1998-08-20 |
US5501915A (en) | 1996-03-26 |
EP0577291A1 (de) | 1994-01-05 |
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