DK280279A - Fremgangsmaade til fremstilling af metallegeringer - Google Patents

Fremgangsmaade til fremstilling af metallegeringer

Info

Publication number
DK280279A
DK280279A DK280279A DK280279A DK280279A DK 280279 A DK280279 A DK 280279A DK 280279 A DK280279 A DK 280279A DK 280279 A DK280279 A DK 280279A DK 280279 A DK280279 A DK 280279A
Authority
DK
Denmark
Prior art keywords
metal alloys
preparing metal
preparing
alloys
metal
Prior art date
Application number
DK280279A
Other languages
English (en)
Other versions
DK150707C (da
DK150707B (da
Inventor
V M Jalan
D A Landsman
Original Assignee
United Technologies Corp
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 United Technologies Corp filed Critical United Technologies Corp
Publication of DK280279A publication Critical patent/DK280279A/da
Publication of DK150707B publication Critical patent/DK150707B/da
Application granted granted Critical
Publication of DK150707C publication Critical patent/DK150707C/da

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90Selection of catalytic material
    • H01M4/92Metals of platinum group
    • H01M4/928Unsupported catalytic particles; loose particulate catalytic materials, e.g. in fluidised state
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/42Platinum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/16Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90Selection of catalytic material
    • H01M4/92Metals of platinum group
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90Selection of catalytic material
    • H01M4/92Metals of platinum group
    • H01M4/925Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M2004/8678Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
    • H01M2004/8684Negative electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M2004/8678Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
    • H01M2004/8689Positive electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00Electrolytes
    • H01M2300/0002Aqueous electrolytes
    • H01M2300/0005Acid electrolytes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00Electrolytes
    • H01M2300/0002Aqueous electrolytes
    • H01M2300/0005Acid electrolytes
    • H01M2300/0008Phosphoric acid-based
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90Selection of catalytic material
    • H01M4/92Metals of platinum group
    • H01M4/921Alloys or mixtures with metallic elements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
  • Inert Electrodes (AREA)
DK280279A 1978-07-03 1979-07-02 Fremgangsmaade til fremstilling af fint fordelte, paa en baerer anbragte legeringskatalysatorer indeholdende platin DK150707C (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/922,004 US4186110A (en) 1978-07-03 1978-07-03 Noble metal-refractory metal alloys as catalysts and method for making
US92200478 1978-07-03

Publications (3)

Publication Number Publication Date
DK280279A true DK280279A (da) 1980-01-04
DK150707B DK150707B (da) 1987-06-01
DK150707C DK150707C (da) 1988-01-25

Family

ID=25446324

Family Applications (1)

Application Number Title Priority Date Filing Date
DK280279A DK150707C (da) 1978-07-03 1979-07-02 Fremgangsmaade til fremstilling af fint fordelte, paa en baerer anbragte legeringskatalysatorer indeholdende platin

Country Status (16)

Country Link
US (1) US4186110A (da)
JP (1) JPS5916495B2 (da)
AU (1) AU527322B2 (da)
BE (1) BE877414A (da)
BR (1) BR7904198A (da)
CA (1) CA1123417A (da)
CH (1) CH645037A5 (da)
DE (1) DE2926615A1 (da)
DK (1) DK150707C (da)
EG (1) EG13886A (da)
FR (1) FR2430264A1 (da)
GB (1) GB2024868B (da)
IL (1) IL57702A (da)
IT (1) IT1121991B (da)
NL (1) NL7905122A (da)
SE (1) SE445611B (da)

Families Citing this family (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316944A (en) * 1980-06-18 1982-02-23 United Technologies Corporation Noble metal-chromium alloy catalysts and electrochemical cell
US4437926A (en) 1980-07-07 1984-03-20 Regie Nationale Des Usines Renault Metal alloy with high catalytic activity
US4383940A (en) * 1980-12-05 1983-05-17 Phillips Petroleum Company Catalysts for hydrogenation of unsaturated dinitriles
US4822699A (en) * 1982-12-20 1989-04-18 Engelhard Corporation Electrocatalyst and fuel cell electrode using the same
US4457986A (en) * 1982-12-30 1984-07-03 International Business Machines Corporation Use of underpotential deposited layers of metals on foreign metal substrates as catalysts for electrolytic cells
US4447506A (en) * 1983-01-17 1984-05-08 United Technologies Corporation Ternary fuel cell catalysts containing platinum, cobalt and chromium
US5079107A (en) * 1984-06-07 1992-01-07 Giner, Inc. Cathode alloy electrocatalysts
JPS62163746A (ja) * 1986-01-13 1987-07-20 Nippon Engeruharudo Kk 白金合金電極触媒およびそれを使用した酸電解質燃料電池用電極
JPS62269751A (ja) * 1986-05-16 1987-11-24 Nippon Engeruharudo Kk 白金−銅合金電極触媒およびそれを使用した酸電解質燃料電池用電極
JP2977199B2 (ja) * 1988-01-22 1999-11-10 田中貴金属工業株式会社 電極触媒
US5246791A (en) * 1988-07-06 1993-09-21 Johnson Matthey Public Limited Company Fuel cell containing a reforming catalyst
US4937220A (en) * 1988-08-08 1990-06-26 International Fuel Cells Corporation Method to retard catalyst recrystallization
CA2016517C (en) * 1989-05-11 1999-01-12 Dale R. Shackle Solid state electrochemical cell having microroughened current collector
US5068161A (en) * 1990-03-30 1991-11-26 Johnson Matthey Public Limited Company Catalyst material
US5126216A (en) * 1990-11-27 1992-06-30 Universite Du Quebec A Montreal Ternary alloy electrocatalysts
US5183713A (en) * 1991-01-17 1993-02-02 International Fuel Cells Corporation Carbon monoxide tolerant platinum-tantalum alloyed catalyst
DE19517598C1 (de) * 1995-05-13 1997-01-02 Degussa Platin-Aluminium-Legierungskatalysator und dessen Verwendung in Brennstoffzellen
JP3903598B2 (ja) * 1997-09-24 2007-04-11 トヨタ自動車株式会社 排ガス浄化用触媒およびその製造方法
US6297185B1 (en) * 1998-02-23 2001-10-02 T/J Technologies, Inc. Catalyst
US6417133B1 (en) 1998-02-25 2002-07-09 Monsanto Technology Llc Deeply reduced oxidation catalyst and its use for catalyzing liquid phase oxidation reactions
CA2334390A1 (en) * 1998-06-05 2000-01-27 Thomas E. Mallouk Method of screening compositions for electrocatalytic activity
US6239065B1 (en) * 1998-12-22 2001-05-29 Hydro-Quebec Process for the preparation of a supported catalyst
ATE310009T1 (de) * 2000-05-22 2005-12-15 Monsanto Technology Llc Reaktionssysteme zur herstellung von n- (phosphonomethyl)glyzin verbindungen
JP3783530B2 (ja) * 2000-06-22 2006-06-07 ヤマハ株式会社 光酸化触媒
DE10059743A1 (de) * 2000-12-01 2002-06-20 Rolf Hempelmann Verfahren zur Katalysatorabscheidung
DE60114982T2 (de) * 2001-02-23 2006-06-22 Umicore Ag & Co. Kg Verfahren zur Herstellung einer elektrokatalytischen Verbindung
EP1236509A1 (en) * 2001-02-23 2002-09-04 Degussa Aktiengesellschaft Catalytic precious metal-treated carbon black
JP2008100227A (ja) * 2001-06-01 2008-05-01 Sony Corp 導電性触媒粒子及びその製造方法、ガス拡散性触媒電極及び電気化学デバイス
US6670300B2 (en) 2001-06-18 2003-12-30 Battelle Memorial Institute Textured catalysts, methods of making textured catalysts, and methods of catalyzing reactions conducted in hydrothermal conditions
JP4963147B2 (ja) * 2001-09-17 2012-06-27 株式会社豊田中央研究所 燃料電池用電極触媒体およびその製造方法
WO2004107482A1 (en) * 2003-05-27 2004-12-09 Symyx Technologies, Inc. Platinum-vanadium-iron fuel cell electrocatalyst
JP4676958B2 (ja) * 2003-08-18 2011-04-27 サイミックス ソリューションズ, インコーポレイテッド 白金−銅燃料電池触媒
JP4463522B2 (ja) * 2003-10-16 2010-05-19 日揮触媒化成株式会社 電極の触媒用微粒子および該電極触媒用微粒子分散液、該電極触媒用微粒子分散液の製造方法
WO2005120703A1 (ja) * 2004-06-10 2005-12-22 Sumitomo Electric Industries, Ltd. 金属触媒とその製造方法
US8703639B2 (en) * 2004-09-15 2014-04-22 Monsanto Technology Llc Oxidation catalyst and its use for catalyzing liquid phase oxidation reactions
US7718309B2 (en) 2004-12-06 2010-05-18 Honda Motor Co., Ltd. Platinum and tungsten containing electrocatalysts
US7736790B2 (en) 2004-12-06 2010-06-15 Honda Motor Co., Ltd. Platinum and tungsten containing electrocatalysts
US20070037696A1 (en) * 2005-01-24 2007-02-15 Symyx Technologies, Inc. Platinum-palladium-titanium fuel cell catalyst
US20080044719A1 (en) * 2005-02-02 2008-02-21 Symyx Technologies, Inc. Platinum-copper-titanium fuel cell catalyst
US7732080B2 (en) * 2005-04-25 2010-06-08 Uchicago Argonne, Llc Catalytic membranes for CO oxidation in fuel cells
US7435504B2 (en) * 2005-08-25 2008-10-14 Honda Motor Co., Ltd. Platinum, tungsten, and nickel or zirconium containing electrocatalysts
KR100757585B1 (ko) * 2005-12-12 2007-09-10 현대자동차주식회사 고분산 백금 담지 촉매의 제조방법
US7704628B2 (en) * 2006-05-08 2010-04-27 Honda Motor Co., Ltd. Platinum, titanium, cobalt and palladium containing electrocatalysts
US7740975B2 (en) * 2006-01-06 2010-06-22 Honda Motor Co., Ltd. Platinum and titanium containing electrocatalysts
US7318977B2 (en) * 2006-01-06 2008-01-15 Honda Motor Co., Ltd. Platinum and titanium containing electrocatalysts
US7691522B2 (en) * 2006-03-09 2010-04-06 Honda Motor Co., Ltd. Platinum, titanium and copper, manganese and iron containing electrocatalysts
US20070160899A1 (en) * 2006-01-10 2007-07-12 Cabot Corporation Alloy catalyst compositions and processes for making and using same
KR100846478B1 (ko) * 2006-05-16 2008-07-17 삼성에스디아이 주식회사 담지 촉매, 그 제조방법 및 이를 이용한 연료전지
KR100738062B1 (ko) * 2006-05-16 2007-07-10 삼성에스디아이 주식회사 막 전극 접합체 및 이를 이용한 연료전지
US7842639B2 (en) * 2006-05-19 2010-11-30 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Mechanical alloying of a hydrogenation catalyst used for the remediation of contaminated compounds
KR101350865B1 (ko) 2006-07-24 2014-01-13 주식회사 동진쎄미켐 연료전지용 담지 촉매 및 그 제조방법, 상기 담지 촉매를포함하는 연료전지용 전극, 상기 전극을 포함하는 막전극접합체 및 상기 막전극 접합체를 포함하는 연료전지
KR101149408B1 (ko) * 2006-11-15 2012-06-01 삼성전자주식회사 연료 전지용 전극의 제조 방법 및 제조 장치
US8383293B2 (en) * 2006-11-22 2013-02-26 GM Global Technology Operations LLC Supports for fuel cell catalysts based on transition metal silicides
KR101397020B1 (ko) * 2007-11-20 2014-05-21 삼성에스디아이 주식회사 연료전지용 전극촉매, 그 제조방법, 상기 전극촉매를포함하는 전극을 구비한 연료전지
EP2257602B1 (en) * 2008-02-19 2018-10-17 Cabot Corporation Mesoporous carbon black with a large bet-surface and processes for making same
US9017837B2 (en) 2008-02-19 2015-04-28 Cabot Corporation High surface area graphitized carbon and processes for making same
US8252953B2 (en) 2008-05-01 2012-08-28 Monsanto Technology Llc Metal utilization in supported, metal-containing catalysts
WO2014079462A1 (en) 2012-11-21 2014-05-30 Danmarks Tekniske Universitet Platinum and palladium alloys suitable as fuel cell electrodes
US9359681B1 (en) * 2013-03-11 2016-06-07 Alexey Serov CO2 electroreduction on metals and metal alloys prepared by a sacrificial support-based method

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384501A (en) * 1942-02-02 1945-09-11 American Platinum Works Platinum metal catalysts and the manufacture thereof
DE838067C (de) * 1942-02-07 1952-03-27 Baker Platinum Limited, London Gesinterte Platinlegierung
US3085876A (en) * 1960-03-01 1963-04-16 Du Pont Process for dispersing a refractory metal oxide in another metal
US3428490A (en) * 1962-08-29 1969-02-18 Sun Oil Co Noble metal aluminum alloys as catalysts for fuel cell electrodes
DE1287051B (de) * 1962-09-07 1969-01-16 Bosch Gmbh Robert Verfahren zur Herstellung von poroesen Gasdiffusionselektroden mit Raney-Katalysatoren
US3340097A (en) * 1964-01-22 1967-09-05 Air Prod & Chem Fuel cell electrode having surface co-deposit of platinum, tin and ruthenium
US3481787A (en) * 1964-06-11 1969-12-02 Engelhard Ind Inc Fuel cell comprising a raney catalyst alloy consisting of platinum and a member selected from the group consisting of zirconium,tungsten and rhenium
US3424619A (en) * 1964-09-28 1969-01-28 Engelhard Ind Inc Process for using fuel cell with hydrocarbon fuel and platinum-niobium alloy catalyst
US3506494A (en) * 1966-12-22 1970-04-14 Engelhard Ind Inc Process for producing electrical energy utilizing platinum-containing catalysts
US3433680A (en) * 1967-01-31 1969-03-18 Us Interior Platinum type electrode for a solid electrolyte fuel cell
US3414439A (en) * 1967-03-13 1968-12-03 Engelhard Ind Inc Fuel cell and process of using with ruthenium-tantalum alloy catalyst
US3989515A (en) * 1972-02-11 1976-11-02 Carl Haas Alloys for tension bands
GB1456369A (en) * 1972-11-30 1976-11-24 Stamicarbon Catalyst preparation
NL7502841A (nl) * 1975-03-11 1976-09-14 Stamicarbon Werkwijze voor het vervaardigen van een metaal- elektrode.
US4053566A (en) * 1975-09-30 1977-10-11 Thiokol Corporation Method of making diammonium hydrazinium tetraperchlorate
LU76107A1 (da) * 1976-10-29 1978-05-16

Also Published As

Publication number Publication date
SE7905541L (sv) 1980-01-04
FR2430264B1 (da) 1985-03-22
DE2926615C2 (da) 1989-07-06
BR7904198A (pt) 1980-04-29
IL57702A (en) 1982-08-31
DK150707C (da) 1988-01-25
AU4860779A (en) 1980-02-07
FR2430264A1 (fr) 1980-02-01
JPS5524595A (en) 1980-02-21
GB2024868A (en) 1980-01-16
CA1123417A (en) 1982-05-11
DE2926615A1 (de) 1980-01-24
IT7924031A0 (it) 1979-07-02
US4186110A (en) 1980-01-29
NL7905122A (nl) 1980-01-07
SE445611B (sv) 1986-07-07
GB2024868B (en) 1982-08-25
JPS5916495B2 (ja) 1984-04-16
BE877414A (fr) 1979-11-05
DK150707B (da) 1987-06-01
AU527322B2 (en) 1983-02-24
CH645037A5 (de) 1984-09-14
EG13886A (en) 1982-09-30
IL57702A0 (en) 1979-11-30
IT1121991B (it) 1986-04-23

Similar Documents

Publication Publication Date Title
DK280279A (da) Fremgangsmaade til fremstilling af metallegeringer
DK25579A (da) Fremgangsmaade til fremstilling af interferon
DK44479A (da) Fremgangsmaade til fremstilling af magnesiumhydrider
DK180481A (da) Fremgangsmaade til fremstilling af metaller
DK160679A (da) Fremgangsmaade til fremstilling af derivater af 4-desacetyl-vincaleucoblastin-c-3-carboxhydrazid
DK140480A (da) Fremgangsmaade til fremstilling af mercaptoacyldipeptider
DK252779A (da) Fremgangsmaade til udvinding af metallisk kobber
DK311879A (da) Fremgangsmaade til formning af en metallegering
DK156253C (da) Fremgangsmaade til fremstilling af pyruvatoxidase
DK209478A (da) Fremgangsmaade til fremstilling af metalgenstande
DK366379A (da) Fremgangsmaade til fremstilling af alkyl-eller arylthiomethylphenoler
DK247080A (da) Fremgangsmaade til behandling af metaloverflader
DK149618C (da) Fremgangsmaade til elektrolytisk fremstilling af benzaldehyder
DK152752C (da) Fremgangsmaade til fremstilling af l-sulpirid
DK87079A (da) Fremgangsmaade til fremstilling af dialkylphospohorchloridothioter
DK120079A (da) Fremgangsmaade til fremstilling af aluminiummonoethylphosphit
DK317279A (da) Fremgangsmaade til strengstoebning af metal
DK36379A (da) Fremgangsmaade til fremstilling af n-ethylethylendiamin
DK143107C (da) Fremgangsmaade til fremstilling af 2-isopropylaminopyrimidin
IT1118892B (it) Decarburizzazione di leghe metalliche
DK158038C (da) Fremgangsmaade til fremstilling af di-n-propylacetonitril
DK147420C (da) Fremgangsmaade til fremstilling af acylcyanider
DK159530C (da) Fremgangsmaade til formning af metal
DK158678A (da) Fremgangsmaade til fremstilling af d-homosteroider
DK144280A (da) Fremgangsmaade til fremstilling af 2-aminopyraziner

Legal Events

Date Code Title Description
PBP Patent lapsed