GB1409019A - Higher alkyl trimethyl ammonium salt liquid hydrocarbon compositions - Google Patents

Higher alkyl trimethyl ammonium salt liquid hydrocarbon compositions

Info

Publication number
GB1409019A
GB1409019A GB457873A GB457873A GB1409019A GB 1409019 A GB1409019 A GB 1409019A GB 457873 A GB457873 A GB 457873A GB 457873 A GB457873 A GB 457873A GB 1409019 A GB1409019 A GB 1409019A
Authority
GB
United Kingdom
Prior art keywords
liquid hydrocarbon
ammonium salt
trimethyl ammonium
higher alkyl
alkyl trimethyl
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
GB457873A
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
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 Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of GB1409019A publication Critical patent/GB1409019A/en
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
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/143Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
    • 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
    • C10L1/192Macromolecular compounds
    • C10L1/195Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • 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
    • C10L1/192Macromolecular compounds
    • C10L1/195Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C10L1/196Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
    • C10L1/1963Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof mono-carboxylic
    • 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
    • C10L1/192Macromolecular compounds
    • C10L1/195Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C10L1/196Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
    • C10L1/1966Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof poly-carboxylic
    • 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
    • C10L1/192Macromolecular compounds
    • C10L1/195Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C10L1/197Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid
    • C10L1/1973Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid mono-carboxylic
    • 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
    • C10L1/20Organic compounds containing halogen
    • C10L1/206Organic compounds containing halogen macromolecular compounds
    • 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
    • C10L1/20Organic compounds containing halogen
    • C10L1/206Organic compounds containing halogen macromolecular compounds
    • C10L1/207Organic compounds containing halogen macromolecular compounds containing halogen with or without hydrogen
    • 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
    • C10L1/22Organic compounds containing nitrogen
    • C10L1/222Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
    • C10L1/2222(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
    • 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
    • C10L1/22Organic compounds containing nitrogen
    • C10L1/234Macromolecular compounds
    • C10L1/236Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives 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
    • 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
    • C10L1/2608Organic compounds containing phosphorus containing a phosphorus-carbon bond
    • C10L1/2625Organic compounds containing phosphorus containing a phosphorus-carbon bond amine salts
    • 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)
    • C10L1/2658Organic compounds containing phosphorus phosphorus bond to oxygen (no P. C. bond) amine salts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

1409019 Liquid hydrocarbon composition EXXON RESEARCH & ENG CO 30 Jan 1973 [7 Feb 1972] 4578/73 Heading C5G A liquid hydrocarbon composition comprises a crude oil, or a petroleum distillate fuel whose boiling range is wholly within the range 250‹ to 750‹ F. and a minor amount of a surface-active, water-soluble salt having the formula wherein R is C 8 to C 40 alkyl and Q is halide, phosphate, phosphite, sulphate, nitrite, carbonylate, sulphonate or phosphonate. In addition a minor amount of a polar polymeric additive, e.g. ethylene/vinyl acetate copolymer, having a M.W. of 400-20,000 may be present. The distillate can be a jet or diesel fuel or a heating oil.
GB457873A 1972-02-07 1973-01-30 Higher alkyl trimethyl ammonium salt liquid hydrocarbon compositions Expired GB1409019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US224341A US3880613A (en) 1972-02-07 1972-02-07 Higher alkyl trimethyl ammonium salt liquid hydrocarbon compositions

Publications (1)

Publication Number Publication Date
GB1409019A true GB1409019A (en) 1975-10-08

Family

ID=22840240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB457873A Expired GB1409019A (en) 1972-02-07 1973-01-30 Higher alkyl trimethyl ammonium salt liquid hydrocarbon compositions

Country Status (7)

Country Link
US (1) US3880613A (en)
JP (1) JPS5533760B2 (en)
CA (1) CA1005341A (en)
DE (1) DE2305438A1 (en)
FR (1) FR2171200B1 (en)
GB (1) GB1409019A (en)
IT (1) IT978851B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348561A (en) * 1990-03-01 1994-09-20 Exxon Chemical Patents Inc. Fuel oil compositions
WO2007030724A2 (en) 2005-09-09 2007-03-15 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
US8353740B2 (en) 2005-09-09 2013-01-15 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4444790A (en) * 1982-05-27 1984-04-24 Millmaster Onyx Group, Inc. Quaternary ammonium disinfectants
US4450174A (en) * 1982-05-27 1984-05-22 Millmaster Onyx Group, Inc. Decyl quaternary ammonium compounds
US4605640A (en) * 1985-05-29 1986-08-12 The United States Of America As Represented By The Secretary Of Agriculture Oil-absorbent cellulosic derivatives
CA2042855A1 (en) * 1990-06-28 1991-12-29 Nicholas Feldman Composition for improving cold flow properties of middle distillates
US5545237A (en) * 1994-07-08 1996-08-13 Exxon Research And Engineering Company Smoke reducing additive for two-cycle engine fuel mixture
US20040138176A1 (en) * 2002-05-31 2004-07-15 Cjb Industries, Inc. Adjuvant for pesticides
US7476646B1 (en) * 2004-09-27 2009-01-13 Cjb Industries, Inc. Agricultural promoters/active ingredients
US9458400B2 (en) * 2012-11-02 2016-10-04 Afton Chemical Corporation Fuel additive for improved performance in direct fuel injected engines
DE102013013712A1 (en) * 2013-08-20 2015-02-26 Mann + Hummel Gmbh Method for increasing the H2O separation efficiency from diesel fuels
US20240018420A1 (en) * 2020-11-16 2024-01-18 Hindustan Petroleum Corporation Limited Dewatering Composition and Implementations Thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295505A (en) * 1939-08-02 1942-09-08 Wm S Merrell Co Composition of matter
US2786797A (en) * 1954-05-18 1957-03-26 Hollingshead Corp Corrosion-inhibited quaternary ammonium compositions
US2975042A (en) * 1955-09-29 1961-03-14 Gulf Oil Corp Fuel oil compositions containing antimicrobial agents
FR1150955A (en) * 1956-05-23 1958-01-22 Exxon Standard Sa Additives against corrosion of equipment containing hydrocarbons
US2951751A (en) * 1958-07-30 1960-09-06 Exxon Research Engineering Co Hydrocarbon oils having improved electrical properties
US3093623A (en) * 1960-01-05 1963-06-11 Exxon Research Engineering Co Process for the manufacture of improved pour depressants for middle distillates
GB976720A (en) * 1963-08-07 1964-12-02 Socony Mobil Oil Co Inc Quaternary ammonium naphthenates as fuel additives
US3366673A (en) * 1964-04-03 1968-01-30 Millmaster Onyx Corp Microbiologically active quaternary ammonium compounds
NL134313C (en) * 1966-06-01
US3493354A (en) * 1967-02-27 1970-02-03 Monsanto Chemicals Diesel fuel additive

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348561A (en) * 1990-03-01 1994-09-20 Exxon Chemical Patents Inc. Fuel oil compositions
WO2007030724A2 (en) 2005-09-09 2007-03-15 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
WO2007030724A3 (en) * 2005-09-09 2007-07-26 Saint Gobain Ceramics Conductive hydrocarbon fluid
US7708904B2 (en) 2005-09-09 2010-05-04 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
CN101263208B (en) * 2005-09-09 2011-06-29 圣戈本陶瓷及塑料股份有限公司 Conductive hydrocarbon fluid
EP2390297A1 (en) * 2005-09-09 2011-11-30 Saint-Gobain Ceramics and Plastics, Inc. Conductive hydrocarbon fluid
CN102295888A (en) * 2005-09-09 2011-12-28 圣戈本陶瓷及塑料股份有限公司 Conductive hydrocarbon fluid
US8353740B2 (en) 2005-09-09 2013-01-15 Saint-Gobain Ceramics & Plastics, Inc. Conductive hydrocarbon fluid
CN102295888B (en) * 2005-09-09 2014-07-23 圣戈本陶瓷及塑料股份有限公司 Conductive hydrocarbon fluid

Also Published As

Publication number Publication date
JPS5533760B2 (en) 1980-09-02
CA1005341A (en) 1977-02-15
FR2171200A1 (en) 1973-09-21
JPS4891108A (en) 1973-11-27
US3880613A (en) 1975-04-29
DE2305438A1 (en) 1973-08-23
IT978851B (en) 1974-09-20
FR2171200B1 (en) 1979-01-12

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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