GB1565074A - Process for the production of ammonia - Google Patents

Process for the production of ammonia Download PDF

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Publication number
GB1565074A
GB1565074A GB45711/76A GB4571176A GB1565074A GB 1565074 A GB1565074 A GB 1565074A GB 45711/76 A GB45711/76 A GB 45711/76A GB 4571176 A GB4571176 A GB 4571176A GB 1565074 A GB1565074 A GB 1565074A
Authority
GB
United Kingdom
Prior art keywords
surface area
catalyst
process according
weight
ammonia
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
Application number
GB45711/76A
Other languages
English (en)
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.)
BP PLC
Original Assignee
BP PLC
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 BP PLC filed Critical BP PLC
Priority to GB45711/76A priority Critical patent/GB1565074A/en
Priority to ZA00776369A priority patent/ZA776369B/xx
Priority to IN1553/CAL/77A priority patent/IN146975B/en
Priority to MX171167A priority patent/MX147295A/es
Priority to CA289,907A priority patent/CA1097887A/en
Priority to US05/847,075 priority patent/US4163775A/en
Priority to BR7707354A priority patent/BR7707354A/pt
Priority to JP52130362A priority patent/JPS5916816B2/ja
Priority to NO773743A priority patent/NO148984C/no
Priority to AU30225/77A priority patent/AU515799B2/en
Priority to IT29263/77A priority patent/IT1143770B/it
Priority to NZ185598A priority patent/NZ185598A/xx
Priority to PL1977201877A priority patent/PL116384B1/pl
Priority to FR7732942A priority patent/FR2369872A1/fr
Priority to PT67232A priority patent/PT67232B/pt
Priority to ES464035A priority patent/ES464035A1/es
Priority to DE19772748972 priority patent/DE2748972A1/de
Priority to NL7712072A priority patent/NL7712072A/xx
Priority to IE2242/77A priority patent/IE46074B1/en
Priority to SU772541696A priority patent/SU904505A3/ru
Priority to BE182317A priority patent/BE860440A/xx
Priority to CS777188A priority patent/CS225807B2/cs
Priority to US05/949,078 priority patent/US4250057A/en
Publication of GB1565074A publication Critical patent/GB1565074A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts 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
    • B01J23/56—Platinum group metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/02—Preparation, purification or separation of ammonia
    • C01C1/04—Preparation of ammonia by synthesis
    • C01C1/0405—Preparation of ammonia by synthesis from N2 and H2 in presence of a catalyst
    • C01C1/0411—Preparation of ammonia by synthesis from N2 and H2 in presence of a catalyst characterised by the catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61—Surface area
    • B01J35/615—100-500 m2/g
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Industrial Gases (AREA)
GB45711/76A 1976-11-03 1976-11-03 Process for the production of ammonia Expired GB1565074A (en)

Priority Applications (23)

Application Number Priority Date Filing Date Title
GB45711/76A GB1565074A (en) 1976-11-03 1976-11-03 Process for the production of ammonia
ZA00776369A ZA776369B (en) 1976-11-03 1977-10-26 Catalyst and process for the production of ammonia
IN1553/CAL/77A IN146975B (enExample) 1976-11-03 1977-10-29
MX171167A MX147295A (es) 1976-11-03 1977-10-31 Procedimiento mejorado para la obtencion de amoniaco
CA289,907A CA1097887A (en) 1976-11-03 1977-10-31 Process for the synthesis of ammonia using a catalyst supported on graphite-containing carbon
US05/847,075 US4163775A (en) 1976-11-03 1977-10-31 Process for the synthesis of ammonia using catalysts supported on graphite containing carbon
BR7707354A BR7707354A (pt) 1976-11-03 1977-11-01 Catalisador para a sintese de amonia,processo para sua preparacao,e processo para producao de amonia
JP52130362A JPS5916816B2 (ja) 1976-11-03 1977-11-01 アンモニアの製造方法
NO773743A NO148984C (no) 1976-11-03 1977-11-01 Fremgangsmaate for fremstilling av ammoniakk
AU30225/77A AU515799B2 (en) 1976-11-03 1977-11-01 Catalyst for production of ammonia
IT29263/77A IT1143770B (it) 1976-11-03 1977-11-02 Catalizzatore per la produzione di ammoniaca,preparazione di tale catalizzatore e processo catalitico
NZ185598A NZ185598A (en) 1976-11-03 1977-11-02 Graphite-containing carbon supported catalyst for production of ammonia
PL1977201877A PL116384B1 (en) 1976-11-03 1977-11-02 Method of manufacture of ammonia
FR7732942A FR2369872A1 (fr) 1976-11-03 1977-11-02 Catalyseur pour la synthese de l'ammoniac a partir d'hydrogene et d'azote
PT67232A PT67232B (en) 1976-11-03 1977-11-02 Chemical process
ES464035A ES464035A1 (es) 1976-11-03 1977-11-02 Un procedimiento para la produccion de amoniaco.
DE19772748972 DE2748972A1 (de) 1976-11-03 1977-11-02 Neue katalysatoren, verfahren zu ihrer herstellung und ihre verwendung
NL7712072A NL7712072A (nl) 1976-11-03 1977-11-02 Katalysator en werkwijzen voor de bereiding en toepassing ervan.
IE2242/77A IE46074B1 (en) 1976-11-03 1977-11-03 Process for the production of ammonia
SU772541696A SU904505A3 (ru) 1976-11-03 1977-11-03 Катализатор дл синтеза аммиака
BE182317A BE860440A (fr) 1976-11-03 1977-11-03 Catalyseur pour la synthese d'ammoniac, sa preparation et son utilisation
CS777188A CS225807B2 (en) 1976-11-03 1977-11-03 The catalytic production of the ammonia
US05/949,078 US4250057A (en) 1976-11-03 1978-10-06 Process for producing a catalyst comprising a graphite containing carbon, a transitional metal and a modifying metal ion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB45711/76A GB1565074A (en) 1976-11-03 1976-11-03 Process for the production of ammonia

Publications (1)

Publication Number Publication Date
GB1565074A true GB1565074A (en) 1980-04-16

Family

ID=10438266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45711/76A Expired GB1565074A (en) 1976-11-03 1976-11-03 Process for the production of ammonia

Country Status (22)

Country Link
US (2) US4163775A (enExample)
JP (1) JPS5916816B2 (enExample)
AU (1) AU515799B2 (enExample)
BE (1) BE860440A (enExample)
BR (1) BR7707354A (enExample)
CA (1) CA1097887A (enExample)
CS (1) CS225807B2 (enExample)
DE (1) DE2748972A1 (enExample)
ES (1) ES464035A1 (enExample)
FR (1) FR2369872A1 (enExample)
GB (1) GB1565074A (enExample)
IE (1) IE46074B1 (enExample)
IN (1) IN146975B (enExample)
IT (1) IT1143770B (enExample)
MX (1) MX147295A (enExample)
NL (1) NL7712072A (enExample)
NO (1) NO148984C (enExample)
NZ (1) NZ185598A (enExample)
PL (1) PL116384B1 (enExample)
PT (1) PT67232B (enExample)
SU (1) SU904505A3 (enExample)
ZA (1) ZA776369B (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058531A1 (en) * 1981-02-13 1982-08-25 The British Petroleum Company p.l.c. Process for the production of ammonia
WO1984003642A1 (en) * 1983-03-18 1984-09-27 British Petroleum Co Plc Improved catalysts and their use in ammonia production
WO1986001500A1 (en) * 1984-08-29 1986-03-13 The British Petroleum Company P.L.C. Fischer-tropsch catalysts
US4698325A (en) * 1985-04-22 1987-10-06 Imperial Chemical Industries Plc Catalysts for ammonia synthesis
US4913736A (en) * 1987-02-13 1990-04-03 The British Petroleum Company P.L.C. Process for recovering platinum group metals
US10322940B2 (en) 2014-12-05 2019-06-18 Japan Science And Technology Agency Composite, method for producing composite, ammonia synthesis catalyst, and ammonia synthesis method

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE415173B (sv) * 1977-12-19 1980-09-15 Atomenergi Ab Forfarande for framstellning av ammoniak genom katalyserad reaktion mellan vete och kveve
US4421533A (en) * 1978-03-27 1983-12-20 Takeda Chemical Industries, Ltd. Method of removing ozone and composition therefor
US4271136A (en) * 1978-10-12 1981-06-02 The British Petroleum Company Limited Process for the production of ammonia
US4309311A (en) * 1980-01-08 1982-01-05 Phillips Petroleum Company Ammonia synthesis with catalyst derived by heating on a support a salt selected from alkali metal, alkaline earth metal, iron and cobalt hexacyanocobaltates and hexacyanoruthenates
US4348370A (en) * 1980-01-08 1982-09-07 Phillips Petroleum Company Ammonia synthesis with catalyst derived by heating on a support a salt selected from alkali metal, alkaline earth metal, iron and cobalt hexacyanocobaltates and hexacyanoruthenates
US4345038A (en) * 1980-12-15 1982-08-17 Exxon Research & Engineering Co. CO Hydrogenation process using steam and molybdenum oxycarbonitride catalyst
US4337232A (en) * 1981-03-16 1982-06-29 Exxon Research & Engineering Co. Ammonia synthesis process using molybdenum oxycarbonitride catalyst
US4313853A (en) * 1980-12-11 1982-02-02 Exxon Research & Engineering Co. Process for forming highly dispersed metal on graphite
US4418154A (en) * 1980-12-15 1983-11-29 Exxon Research And Engineering Co. CO Hydrogenation process using molybdenum oxycarbonitride catalyst
US4483756A (en) * 1982-09-27 1984-11-20 Atlantic Richfield Company Method of applying electrical energy to a reactant chamber
FR2565126A1 (fr) * 1984-05-30 1985-12-06 Applic Catalytiques Ste Ly Nouvelle composition catalytique pour la combustion d'hydrocarbures et plus particulierement du methane
US4568532A (en) * 1984-10-16 1986-02-04 The M. W. Kellogg Company Supplemental ammonia synthesis
US4568530A (en) * 1984-10-16 1986-02-04 The M. W. Kellogg Company Ammonia synthesis
GB8509530D0 (en) * 1985-04-13 1985-05-15 Bp Chem Int Ltd Hydrogenation of carboxylic acids
US4789538A (en) * 1987-07-17 1988-12-06 Standard Oil Method of preparing ammonia and ammonia synthesis catalysts
AU678556B2 (en) * 1992-05-22 1997-06-05 Hyperion Catalysis International, Inc. Catalyst supports, supported catalysts methods of making the same and methods of using the same
US5344626A (en) * 1992-06-26 1994-09-06 Minnesota Mining And Manufacturing Company Dual impregnated activated carbon
KR970702758A (ko) 1994-04-29 1997-06-10 마이클 제이. 켈리 개선된 다이 립을 갖는 조합 롤 및 다이 피복 방법 및 장치(combination roll and die coating method and apparatus with improved die lip)
US6699454B1 (en) 1994-05-12 2004-03-02 Hyperion Catalysis International, Inc. Catalysts for the manufacture of carbon fibrils and methods of use thereof
US5523483A (en) * 1995-06-16 1996-06-04 The M. W. Kellogg Company Integrated urea/ammonia process
US5736116A (en) * 1995-10-25 1998-04-07 The M. W. Kellogg Company Ammonia production with enriched air reforming and nitrogen injection into the synthesis loop
FR2752534B1 (fr) * 1996-08-22 1998-10-16 Rhone Poulenc Chimie Procede de traitement d'une solution ou suspension de composes organiques par oxydation en voie humide
DE69732781T2 (de) * 1997-11-28 2006-02-02 Ammonia Casale S.A. Verfahren zur in-situ Modernisierung eines heterogenen exothermen Synthesereaktors
US6132687A (en) * 1998-05-21 2000-10-17 Kellogg Brown & Root, Inc. Horizontal ammonia converter adapted for high activity catalyst
US6171570B1 (en) * 1998-10-12 2001-01-09 Kellogg Brown & Root, Inc. Isothermal ammonia converter
US6902709B1 (en) * 1999-06-09 2005-06-07 Kabushiki Kaisha Toshiba Hydrogen removing apparatus
ITMI20012565A1 (it) * 2001-12-05 2003-06-05 Univ Degli Studi Milano Catalizzatori per la sintesi dell'ammoniaca
US7081230B2 (en) * 2002-11-15 2006-07-25 Kellogg Brown & Root Llc Split-flow, vertical ammonia converter
US7879753B2 (en) * 2003-05-27 2011-02-01 Industrie De Nora S.P.A. Catalyst for oxygen reduction
US7892511B2 (en) * 2004-07-02 2011-02-22 Kellogg Brown & Root Llc Pseudoisothermal ammonia process
US7435401B2 (en) * 2004-07-02 2008-10-14 Kellogg Brown & Root Llc Pseudoisothermal ammonia process
US7371361B2 (en) * 2004-11-03 2008-05-13 Kellogg Brown & Root Llc Maximum reaction rate converter system for exothermic reactions
US8152988B2 (en) 2007-08-31 2012-04-10 Energy & Enviromental Research Center Foundation Electrochemical process for the preparation of nitrogen fertilizers
US9005422B2 (en) 2007-08-31 2015-04-14 Energy & Environmental Research Center Foundation Electrochemical process for the preparation of nitrogen fertilizers
WO2009061954A1 (en) * 2007-11-06 2009-05-14 Quantumsphere, Inc. System and method for ammonia synthesis
US20100183497A1 (en) * 2007-11-06 2010-07-22 Quantumsphere, Inc. System and method for ammonia synthesis
US20090202417A1 (en) * 2007-11-06 2009-08-13 Quantumsphere, Inc. System and method for ammonia synthesis
CA2800874A1 (en) * 2010-05-28 2011-12-01 Graphea, Inc. Carbocatalysts for chemical transformations
US9150423B2 (en) 2010-12-07 2015-10-06 Tokyo Institute Of Technology Ammonia synthesis catalyst and ammonia synthesis method
CN103357406B (zh) * 2013-08-02 2016-05-04 福州大学 一种稀土元素掺杂的钙钛矿型负载钌氨合成催化剂
JP6556695B2 (ja) 2014-03-13 2019-08-07 国立研究開発法人科学技術振興機構 アンモニア合成触媒及びアンモニア合成方法
US10792645B2 (en) 2015-12-25 2020-10-06 Japan Science And Technology Agency Transition-metal-supporting intermetallic compound, supported metallic catalyst, and ammonia producing method
JP2017154924A (ja) * 2016-03-01 2017-09-07 三菱重工業株式会社 活性炭、活性炭の処理方法、アンモニア合成触媒及びアンモニア合成触媒の製造方法
WO2018215202A1 (en) * 2017-05-22 2018-11-29 Siemens Aktiengesellschaft Catalyst for ammonia synthesis
JP2020157243A (ja) * 2019-03-27 2020-10-01 国立研究開発法人産業技術総合研究所 アンモニア合成触媒
CN116809052B (zh) * 2023-08-29 2023-11-28 北京大学 一种锕系离子-石墨炔复合材料及其制备方法和应用

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US1068967A (en) * 1910-12-24 1913-07-29 Basf Ag Production of ammonia and catalytic agents for use therein.
US1119534A (en) * 1912-10-05 1914-12-01 Dynamit Ag Method for the preparation of ammonia from the elements.
US1157253A (en) * 1913-11-24 1915-10-19 Mathias Pier Process for the manufacture of ammonia from its elements.
US3660028A (en) * 1969-02-06 1972-05-02 Univ Tokyo Ammonia synthesis catalyst
CA965766A (en) * 1970-06-22 1975-04-08 Akio Furuta Ammonia synthesis catalyst and process
DE2114769C3 (de) * 1970-09-14 1974-08-01 Sagami Chemical Research Center, Tokio Verfahren zur Herstellung eines Katalysators für die Ammoniaksynthese
US3697449A (en) * 1970-12-14 1972-10-10 Du Pont Alkali moderation of supported ruthenium catalysts
JPS4852693A (enExample) * 1971-11-08 1973-07-24
GB1468441A (en) * 1974-09-02 1977-03-23 British Petroleum Co Catalyst support
US4122040A (en) * 1974-09-02 1978-10-24 The British Petroleum Company Limited Platinum group metal catalyst
US4055628A (en) * 1974-09-02 1977-10-25 The British Petroleum Company Limited Method for preparing graphite containing carbon
FR2282940A1 (fr) * 1974-09-02 1976-03-26 British Petroleum Co Catalyseur d'un metal du groupe du platine et son support
GB1471589A (en) * 1974-10-24 1977-04-27 British Petroleum Co Desulphurisation catalyst and process
US3951862A (en) * 1974-10-30 1976-04-20 The Lummus Company Process for the preparation of ammonia synthesis catalyst

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058531A1 (en) * 1981-02-13 1982-08-25 The British Petroleum Company p.l.c. Process for the production of ammonia
WO1984003642A1 (en) * 1983-03-18 1984-09-27 British Petroleum Co Plc Improved catalysts and their use in ammonia production
EP0120655A1 (en) * 1983-03-18 1984-10-03 The British Petroleum Company p.l.c. Improved catalysts and their use in ammonia production
TR22456A (tr) * 1983-03-18 1987-07-13 British Petroleum Co Plc Islah edilmis katalizoerler ve bunlarin amonyak ueretiminde kullanilmasi
WO1986001500A1 (en) * 1984-08-29 1986-03-13 The British Petroleum Company P.L.C. Fischer-tropsch catalysts
US4698325A (en) * 1985-04-22 1987-10-06 Imperial Chemical Industries Plc Catalysts for ammonia synthesis
AU580404B2 (en) * 1985-04-22 1989-01-12 Imperial Chemical Industries Plc Catalysts
US4913736A (en) * 1987-02-13 1990-04-03 The British Petroleum Company P.L.C. Process for recovering platinum group metals
US10322940B2 (en) 2014-12-05 2019-06-18 Japan Science And Technology Agency Composite, method for producing composite, ammonia synthesis catalyst, and ammonia synthesis method

Also Published As

Publication number Publication date
NZ185598A (en) 1980-04-28
JPS5357193A (en) 1978-05-24
AU3022577A (en) 1979-05-10
DE2748972A1 (de) 1978-05-11
PT67232B (en) 1979-04-16
IE46074B1 (en) 1983-02-09
NO773743L (no) 1978-05-05
FR2369872A1 (fr) 1978-06-02
DE2748972C2 (enExample) 1990-05-17
IT1143770B (it) 1986-10-22
IN146975B (enExample) 1979-10-20
IE46074L (en) 1978-05-03
BE860440A (fr) 1978-05-03
ES464035A1 (es) 1978-07-16
FR2369872B1 (enExample) 1984-10-12
US4163775A (en) 1979-08-07
CA1097887A (en) 1981-03-24
PL116384B1 (en) 1981-06-30
CS225807B2 (en) 1984-02-13
JPS5916816B2 (ja) 1984-04-18
BR7707354A (pt) 1978-06-20
PT67232A (en) 1977-12-01
US4250057A (en) 1981-02-10
ZA776369B (en) 1979-06-27
MX147295A (es) 1982-11-10
PL201877A1 (pl) 1978-06-19
NO148984C (no) 1984-01-25
SU904505A3 (ru) 1982-02-07
NO148984B (no) 1983-10-17
NL7712072A (nl) 1978-05-08
AU515799B2 (en) 1981-04-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee