EP0279090B1 - Compositions d'essence contenant du molybdène hexavalent - Google Patents

Compositions d'essence contenant du molybdène hexavalent Download PDF

Info

Publication number
EP0279090B1
EP0279090B1 EP87301344A EP87301344A EP0279090B1 EP 0279090 B1 EP0279090 B1 EP 0279090B1 EP 87301344 A EP87301344 A EP 87301344A EP 87301344 A EP87301344 A EP 87301344A EP 0279090 B1 EP0279090 B1 EP 0279090B1
Authority
EP
European Patent Office
Prior art keywords
molybdenum
gasoline
fuel composition
compound
octane requirement
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
EP87301344A
Other languages
German (de)
English (en)
Other versions
EP0279090A1 (fr
Inventor
Paul James Cahill
Larry Charles Satek
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 Corp North America Inc
Original Assignee
BP Corp North America Inc
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
Priority to US06/833,225 priority Critical patent/US4647293A/en
Application filed by BP Corp North America Inc filed Critical BP Corp North America Inc
Priority to AT87301344T priority patent/ATE69835T1/de
Priority to DE8787301344T priority patent/DE3774868D1/de
Priority to EP87301344A priority patent/EP0279090B1/fr
Publication of EP0279090A1 publication Critical patent/EP0279090A1/fr
Application granted granted Critical
Publication of EP0279090B1 publication Critical patent/EP0279090B1/fr
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00Use of additives to fuels or fires for particular purposes
    • C10L10/10Use of additives to fuels or fires for particular purposes for improving the octane number
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/1814Chelates
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/182Organic compounds containing oxygen containing hydroxy groups; Salts thereof
    • C10L1/1828Salts thereof
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/188Carboxylic acids; metal salts thereof
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/24Organic compounds containing sulfur, selenium and/or tellurium
    • C10L1/2431Organic compounds containing sulfur, selenium and/or tellurium sulfur bond to oxygen, e.g. sulfones, sulfoxides
    • C10L1/2437Sulfonic acids; Derivatives thereof, e.g. sulfonamides, sulfosuccinic acid esters
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/26Organic compounds containing phosphorus
    • C10L1/2633Organic compounds containing phosphorus phosphorus bond to oxygen (no P. C. bond)
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/30Organic compounds compounds not mentioned before (complexes)
    • C10L1/305Organic compounds compounds not mentioned before (complexes) organo-metallic compounds (containing a metal to carbon bond)

Definitions

  • One aspect of the invention is an unleaded gasoline, used in "clean,” new engines, containing a low concentration of a hydrocarbon soluble molybdenum (VI) compound comprising a major portion of gasoline and about 0.1 to about 20 parts of the molybdenum (VI) compound per one million parts of gasoline.
  • a molybdenum (VI) compound can be used in an amount which is sufficient to provide from about 0.01 to about 10 parts of molybdenum, calculated as the metal, per million parts of gasoline.
  • a further aspect of the invention is a concentrate of a hydrocarbon soluble molybdenum (VI) compound containing about 0.1 to about 50 wt% of the compound in a suitable diluent which can be dissolved in proper proportion in gasoline or lubricating oil to provide about 0.1 to about 10,000 parts of molybdenum (VI) compound per one million parts of gasoline or about 0.001 to about 5 wt% of molybdenbum (VI) compound in a lubricating oil.
  • a hydrocarbon soluble molybdenum (VI) compound containing about 0.1 to about 50 wt% of the compound in a suitable diluent which can be dissolved in proper proportion in gasoline or lubricating oil to provide about 0.1 to about 10,000 parts of molybdenum (VI) compound per one million parts of gasoline or about 0.001 to about 5 wt% of molybdenbum (VI) compound in a lubricating oil.
  • any hydrocarbon soluble molybdenum(VI) compound which is stable in hydrocarbon or petroleum storage or distribution facilities can be used in gasoline in accordance with this invention.
  • the molybdenum(VI) or compound is selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI) diamine complexes, amine salts of molybdic acid and isopoly molybdic acid, and molybdenum(VI) compounds which are free of nitrogen, sulfur and phosphorus.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Combustion & Propulsion (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Lubricants (AREA)

Claims (10)

  1. Composition de carburant à base d'essence, comprenant une proportion majeure d'un carburant hydrocarboné liquide du domaine d'ébullition de l'essence, en combinaison avec un composé de molybdène (VI) qui est soluble dans ledit carburant hydrocarboné, dans laquelle la quantité dudit composé de molybdène (VI) est suffisante pour fournir de 0,01 à 1000 parties de molybdène par million de parties de carburant hydrocarboné, ladite composition de carburant est essentiellement exempte de métaux autres que le molybdène, et ledit composé de molybdène (VI) est choisi parmi les sulfonates de molybdène (VI), les complexes de molybdène (VI)-diamine dans lesquels le ligand diamine a pour formule R⁴R⁵N-(CR⁴R⁵)n-NR⁴R⁵, dans laquelle n est un nombre entier de 1 à 20 et chaque R⁴ et R⁵ est choisi indépendamment parmi un hydrogène et un groupe alkyle de 1 à 20 atomes de carbone, et les composé de molybdène (VI) qui sont exempts d'azote, de soufre et de phosphore.
  2. Composition de carburant à base d'essence selon la revendication 1, dans laquelle ledit composé de molybdène (VI) est choisi parmi les carboxylates de molybdène (VI), les sels de molybdène (VI) d'acides naphténiques, les phénates de molybdène (VI), les alcoolates de molybdène (VI), les aryloxydes de molybdène (VI) et les composés molybdène (VI)-β-dicétone.
  3. Composition de carburant à base d'essence selon la revendication 1, dans laquelle ledit composé de molybdène (VI) est un complexe molybdène (VI)-β-dicétone.
  4. Composition de carburant à base d'essence selon l'une quelconque des revendications précédentes, qui comprend, en outre, une quantité mineure de méthyl-t-butyléther efficace pour réduire la détonation dans un moteur à combustion interne à allumage par étincelle.
  5. Composition de carburant à base d'essence selon l'une quelconque des revendications 1 à 4, dans laquelle la quantité dudit composé de molybdène (VI) est de 0,1 à 20,0 parties par million de parties du carburant hydrocarboné.
  6. Composition de carburant à base d'essence selon l'une quelconque des revendications 1 à 4, dans laquelle la quantité dudit composé de molybdène (VI) est suffisante pour fournir de 0,01 à 10 parties de molybdène par million de parties dudit carburant hydrocarboné.
  7. Composition de carburant à base d'essence selon l'une quelconque des revendications 1 à 4, dans laquelle la quantité dudit composé de molybdène (VI) est suffisante pour fournir de 10 à 1000 parties de molybdène par million de parties dudit carburant hydrocarboné.
  8. Procédé pour abaisser-élever le besoin en indice d'octane en régime permanent et/ou pour freiner la hausse du besoin en indice d'octane dans un moteur à combustion interne à allumage par étincelle, ce procédé comprenant le fonctionnement dudit moteur avec la composition de carburant à base d'essence selon l'une quelconque des revendications 1 à 7.
  9. Procédé selon la revendication 8 pour abaisser un besoin en indice d'octane élevée en régime permanent dans un moteur à combustion interne à allumage par étincelle et pour maintenir le besoin en indice d'octane réduit résultant en régime permanent, qui comprend les étapes qui consistent à faire fonctionner ledit moteur avec une première composition de carburant à base d'essence jusqu'à ce que l'on obtienne un besoin en indice d'octane réduit en régime permanent et à maintenir ledit besoin en indice d'octane réduit en régime permanent en faisant fonctionner le moteur avec une seconde composition de carburant à base d'essence, dans lequel ladite première composition de carburant comprend une composition de carburant à base d'essence selon la revendication 7 et dans lequel ladite seconde composition de carburant comprend une composition de carburant à base d'essence selon la revendication 6.
  10. Procédé selon la revendication 8 pour abaisser un besoin en indice d'octane élevé en régime permanent dans un moteur à combustion interne à allumage par étincelle ayant un besoin en indice d'octane accru d'environ 2 à environ 7 unités après un fonctionnement avec de l'essence essentiellement exempte de plomb et de molybdène, qui comprend le fonctionnement dudit moteur avec une composition de carburant à base d'essence selon la revendication 7 et la quantité de ladite composition de carburant à base d'essence est efficace pour abaisser ledit besoin en indice d'octane élevé en régime permanent d'au moins environ 20%.
EP87301344A 1980-09-25 1987-02-17 Compositions d'essence contenant du molybdène hexavalent Expired EP0279090B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US06/833,225 US4647293A (en) 1980-09-25 1986-02-24 Gasoline compositions containing hexavalent molybdenum
AT87301344T ATE69835T1 (de) 1987-02-17 1987-02-17 Sechswertiges molybdaen enthaltende benzinzusammensetzungen.
DE8787301344T DE3774868D1 (de) 1987-02-17 1987-02-17 Sechswertiges molybdaen enthaltende benzinzusammensetzungen.
EP87301344A EP0279090B1 (fr) 1987-02-17 1987-02-17 Compositions d'essence contenant du molybdène hexavalent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87301344A EP0279090B1 (fr) 1987-02-17 1987-02-17 Compositions d'essence contenant du molybdène hexavalent

Publications (2)

Publication Number Publication Date
EP0279090A1 EP0279090A1 (fr) 1988-08-24
EP0279090B1 true EP0279090B1 (fr) 1991-11-27

Family

ID=8197792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87301344A Expired EP0279090B1 (fr) 1980-09-25 1987-02-17 Compositions d'essence contenant du molybdène hexavalent

Country Status (3)

Country Link
EP (1) EP0279090B1 (fr)
AT (1) ATE69835T1 (fr)
DE (1) DE3774868D1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124600A (en) * 1964-03-10 Organometallic compounds
US2086775A (en) * 1936-07-13 1937-07-13 Leo Corp Method of operating an internal combustion engine
GB770278A (en) * 1954-04-30 1957-03-20 Exxon Research Engineering Co Fuel composition
US2881062A (en) * 1955-08-17 1959-04-07 Tide Water Associated Oil Comp Hydrocarbon fuel
GB894852A (en) * 1958-12-08 1962-04-26 Geoffrey Wilkinson Cycloheptatrienyl metallocarbonyl compounds
US3168368A (en) * 1960-04-27 1965-02-02 Air Prod & Chem Method of treating exhaust gases of internal combustion engines
US3282838A (en) * 1960-05-10 1966-11-01 Texaco Inc Petroleum liquids containing amine salts of molybdic acid
US3093671A (en) * 1960-11-14 1963-06-11 Ethyl Corp Cyclic diene group vi-beta metal carbonyls
NL273044A (fr) * 1960-12-30
US3755195A (en) * 1968-12-20 1973-08-28 Ethyl Corp Spark plug anti-foulant
AU5525773A (en) * 1972-06-14 1974-11-07 Continental Oil Co Stable oil-soluble metal sulfonate compositions stable oil-soluble metal sulfonate compositions
US4266945A (en) * 1979-11-23 1981-05-12 The Lubrizol Corporation Molybdenum-containing compositions and lubricants and fuels containing them
US4647293A (en) * 1980-09-25 1987-03-03 William H. Magidson Gasoline compositions containing hexavalent molybdenum
US4357149A (en) * 1980-09-25 1982-11-02 Standard Oil Company (Indiana) Hydrocarbon-soluble oxidized, sulfurized polyamine-molbdenum compositions and gasoline containing same
GB2089431B (en) * 1980-12-06 1984-06-06 Weir Pumps Ltd Preventing surge in pumps

Also Published As

Publication number Publication date
DE3774868D1 (de) 1992-01-09
EP0279090A1 (fr) 1988-08-24
ATE69835T1 (de) 1991-12-15

Similar Documents

Publication Publication Date Title
AU653424B2 (en) Organometallic complex-antioxidant combinations, and concentrates and diesel fuels containing same
US3849085A (en) Motor fuel composition
US5312461A (en) Dihydrocarbyl substituted phenylenediamine-derived phenolic products as antioxidants
DE69907138T2 (de) Brennstoffzusätze
US20080028674A1 (en) Method of Operating Internal Combustion Engine by Introducing Antioxidant into Combustion Chamber
WO2005087901A2 (fr) Composition
US5562742A (en) Copper-containing organometallic complexes and concentrates and diesel fuels containing same
AU2225092A (en) Diesel fuels with organometallic complex
US4647293A (en) Gasoline compositions containing hexavalent molybdenum
US4189306A (en) Hexacoordinated transition metal compounds and fuel compositions containing them
US3356707A (en) Boron esters and process of preparing same
EP0279090B1 (fr) Compositions d'essence contenant du molybdène hexavalent
CA2083835A1 (fr) Carburants diesel a faible teneur en soufre contenant des complexes organometalliques
US3655560A (en) Fuels and lubricants containing aminoguanidine antioxidants
US5348559A (en) Copper-containing aromatic mannich complexes and concentrates and diesel fuels containing same
US3976440A (en) Non-leaded gasoline having improved anti-knock quality
CA1274390A (fr) Compositions d'essence au molybdene hexavalent pour l'automobile
US4215997A (en) Fuel compositions containing tetracoordinated cobalt compounds
US3976439A (en) Non-leaded gasoline having improved anti-knock quality
US4536192A (en) Additives for improving the research octane number of liquid hydrocarbon fuels
US4416669A (en) Fuel and lubricant compositions for octane requirement reduction
US3481716A (en) Diesel fuel composition
US2966462A (en) Anti-varnish lubricating composition
JPS63227696A (ja) 6価モリブデン含有ガソリン組成物およびそれを用いるオクタン要求値抑制方法
EP0086049A1 (fr) Compositions utilisables dans un alcool et alcools contenant des fuels

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19890127

17Q First examination report despatched

Effective date: 19891024

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19911127

Ref country code: LI

Effective date: 19911127

Ref country code: SE

Effective date: 19911127

Ref country code: CH

Effective date: 19911127

Ref country code: AT

Effective date: 19911127

Ref country code: NL

Effective date: 19911127

REF Corresponds to:

Ref document number: 69835

Country of ref document: AT

Date of ref document: 19911215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3774868

Country of ref document: DE

Date of ref document: 19920109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920310

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940111

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940113

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940125

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940128

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19950228

BERE Be: lapsed

Owner name: ETHYL CORP.

Effective date: 19950228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19951031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19951101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST