Assignee
ELF FRANCE
FR·94 granted patents·2,181 citations·filing 1979–1995
Top patents by PatentIndex Score
94 records- 0195US4554313AProcess for preparing bitumen-polymer compositions, application of these compositions of the obtention of coverings and mother solution of polymer usable for the obtention of the said compositionsELF FRANCE·Filed 1983·Granted Nov 19, 1985·92 cites·40 claims
- 0294US4330449AProcess for preparation of compositions of bitumen polymers and productsELF FRANCE·Filed 1981·Granted May 18, 1982·85 cites·4 claims
- 0391US4417083AProcess for the dehydrocyclization of paraffins at low pressureELF FRANCE·Filed 1982·Granted Nov 22, 1983·54 cites·8 claims
- 0490US5096684AProcess for the synthesis of precursors of molecular sieves of the silicoaluminophosphate type, precursors obtained and their application to obtaining the said molecular sievesELF FRANCE·Filed 1990·Granted Mar 17, 1992·112 cites·25 claims
- 0588US4584064ADevice and installations for the distillation by thin layer evaporation particularly of hydrocarbons, and process for operating this deviceELF FRANCE·Filed 1984·Granted Apr 22, 1986·97 cites·9 claims
- 0688US4506636ADevice for controlling a gas circuit of a combustion chamber and a sealing member for its operationELF FRANCE·Filed 1983·Granted Mar 26, 1985·39 cites·17 claims
- 0787US5382612AProcess for preparing in aqueous emulsion a bitumen/polymer binder with continuous three-dimensional polymeric structure and application of this binder to the production of facings or bituminous mixesELF FRANCE·Filed 1991·Granted Jan 17, 1995·53 cites·44 claims
- 0887US4772648ACationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsionsELF FRANCE·Filed 1986·Granted Sep 20, 1988·31 cites·26 claims
- 0987US4493901ARegeneration process of an aromatization catalyst containing a Group VIII metal on a zeoliteELF FRANCE·Filed 1982·Granted Jan 15, 1985·24 cites·6 claims
- 1087US4416806ACatalyst for production of aromatic hydrocarbons and process for preparationELF FRANCE·Filed 1983·Granted Nov 22, 1983·47 cites·32 claims
- 1185US4702338ASuspension device for a vehicle wheel support arm and front-rear coupling system for said suspensionELF FRANCE·Filed 1986·Granted Oct 27, 1987·66 cites·9 claims
- 1285US4567222AProcess for preparing bitumen-polymer compositions, application to these compositions of the obtention of coverings and mother solution of polymer usable for the obtention of the said compositionsELF FRANCE·Filed 1985·Granted Jan 28, 1986·40 cites·22 claims
- 1384US5120777ABitumen/polymer composition exhibiting an adhesiveness which is retained on storage at elevated temperature and process for preparing such a compositionELF FRANCE·Filed 1990·Granted Jun 9, 1992·45 cites·43 claims
- 1484US4834412AMotorcycle front wheel suspension deviceELF FRANCE·Filed 1987·Granted May 30, 1989·63 cites·5 claims
- 1582US5268029ACationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsionsELF FRANCE·Filed 1991·Granted Dec 7, 1993·29 cites·54 claims
- 1682US5156231ASuspension-corrective device designed especially for a motorcycleELF FRANCE·Filed 1991·Granted Oct 20, 1992·59 cites·1 claims
- 1781US4708720AProtection of hydrocarbons against the action of microorganismsELF FRANCE·Filed 1986·Granted Nov 24, 1987·30 cites·14 claims
- 1880US4576648ACationic emulsions of bituminous binders of the bitumen type and their process of preparationELF FRANCE·Filed 1985·Granted Mar 18, 1986·35 cites·17 claims
- 1979US4650027ACoupling device between a front suspension and a rear suspension of a vehicleELF FRANCE·Filed 1985·Granted Mar 17, 1987·55 cites·4 claims
- 2078US5508112AProcess for the preparation of bitumen-polymer compositionELF FRANCE·Filed 1995·Granted Apr 16, 1996·42 cites·19 claims
- 2178US4611086AProcess for hydration of olefinsELF FRANCE·Filed 1984·Granted Sep 9, 1986·13 cites·12 claims
- 2278US4574749ACounterbalanced piston rotary machineELF FRANCE·Filed 1984·Granted Mar 11, 1986·26 cites·6 claims
- 2375US4574743AHeat generator for heating a fluid by heat exchange through a fluidized bed and a process for implementing sameELF FRANCE·Filed 1984·Granted Mar 11, 1986·39 cites·17 claims
- 2474US4606309ADevice for controlling the combustion chambers exhaust and/or intake for internal combustion enginesELF FRANCE·Filed 1985·Granted Aug 19, 1986·27 cites·17 claims
- 2573US4993734ACoupling device between a steerable wheel and a steering control memberELF FRANCE·Filed 1989·Granted Feb 19, 1991·44 cites·10 claims
- 2673US4847224ABinary zeolitic systems, their synthesis and their utilizationELF FRANCE·Filed 1987·Granted Jul 11, 1989·29 cites·5 claims
- 2773US4653604ASuspension and or shock-absorbing device for a support arm of a vehicle wheelELF FRANCE·Filed 1985·Granted Mar 31, 1987·38 cites·7 claims
- 2872US4890857ASteerable wheels of land vehiclesELF FRANCE·Filed 1988·Granted Jan 2, 1990·46 cites·8 claims
- 2972US4756547ASuspension and steering control device for motorcycleELF FRANCE·Filed 1987·Granted Jul 12, 1988·43 cites·11 claims
- 3071US4650581AApparatus for separating a phase dispersed by emulsion or by suspension in a continuous phaseELF FRANCE·Filed 1984·Granted Mar 17, 1987·31 cites·18 claims
- 3169US4732480AInterferometric device for detecting gasELF FRANCE·Filed 1986·Granted Mar 22, 1988·31 cites·6 claims
- 3269US4565088AProcess and apparatus for the detection of changes of composition in a medium with the aid of ultrasoundELF FRANCE·Filed 1984·Granted Jan 21, 1986·27 cites·11 claims
- 3368US5073309ADevice for dispersion of gas in a liquid phaseELF FRANCE·Filed 1988·Granted Dec 17, 1991·40 cites·11 claims
- 3466US4374282AEthers of polyols, their preparation and useELF FRANCE·Filed 1980·Granted Feb 15, 1983·17 cites·9 claims
- 3565US5007733AProcess and device for determining the cloud point of a diesel oilELF FRANCE·Filed 1985·Granted Apr 16, 1991·32 cites·4 claims
- 3664US4804495AReduced viscosity heavy hydrocarbon composition in form of multiple emulsion and its productionELF FRANCE·Filed 1986·Granted Feb 14, 1989·19 cites·20 claims
- 3763US4681680ADevice for the selective and continuous recovery of hydrocarbons present in the form of a sheet at the surface of an aqueous mediumELF FRANCE·Filed 1983·Granted Jul 21, 1987·26 cites·14 claims
- 3863US4583585ASystem for cleaning tube-type exchangers automatically during operationELF FRANCE·Filed 1984·Granted Apr 22, 1986·24 cites·4 claims
- 3962US4753909ABridged clays of improved thermal stability process for their preparation and utilization as catalystsELF FRANCE·Filed 1986·Granted Jun 28, 1988·18 cites·10 claims
- 4060US4850327ADevice for improving the feed of diesel engines at low temperaturesELF FRANCE·Filed 1988·Granted Jul 25, 1989·15 cites·4 claims
- 4160US4610696AProcess for the formation of homogeneous fuel compositions containing a petroleum cut and at least one short chain aliphatic alcohol and compositions thereby obtainedELF FRANCE·Filed 1985·Granted Sep 9, 1986·14 cites·8 claims
- 4256US4543195AFriction-reducing lubricating compositions each comprising an additiveELF FRANCE·Filed 1983·Granted Sep 24, 1985·13 cites·6 claims
- 4356US4396400AProcess for improving the combustion of gas oilsELF FRANCE·Filed 1981·Granted Aug 2, 1983·11 cites·18 claims
- 4456US4367074ANovel filter aid compositions for improving the limiting filterability temperature and inhibition of n-paraffin crystal formation during low temperature of middle distillatesELF FRANCE·Filed 1981·Granted Jan 4, 1983·12 cites·13 claims
- 4555US4756819AProcess for the thermal treatment of hydrocarbon charges in the presence of additives which reduce coke formationELF FRANCE·Filed 1984·Granted Jul 12, 1988·18 cites·13 claims
- 4654US5246986ABituminous binder emulsion with a viscosity controlled by addition of scleroglucanELF FRANCE·Filed 1990·Granted Sep 21, 1993·17 cites·25 claims
- 4754US4785905ASuspension device for a motorcycle front wheelELF FRANCE·Filed 1986·Granted Nov 22, 1988·23 cites·8 claims
- 4853US5046590ABraking device for a rotary elementELF FRANCE·Filed 1991·Granted Sep 10, 1991·13 cites·3 claims
- 4953US4622047AHomogeneous and stable composition of asphaltenic liquid hydrocarbons and additive useful as industrial fuelELF FRANCE·Filed 1986·Granted Nov 11, 1986·11 cites·15 claims
- 5051US4879326ACationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsionsELF FRANCE·Filed 1988·Granted Nov 7, 1989·7 cites·21 claims
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