Assignee

ELF FRANCE

FR94 patents

Top patents by PatentIndex Score

US5156231AOct 20, 1992

Suspension-corrective device designed especially for a motorcycle

ELF FRANCE59 citations95

US4834412AMay 30, 1989

Motorcycle front wheel suspension device

ELF FRANCE63 citations95

US4702338AOct 27, 1987

Suspension device for a vehicle wheel support arm and front-rear coupling system for said suspension

ELF FRANCE66 citations95

US4554313ANov 19, 1985

Process 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 compositions

ELF FRANCE92 citations95

US4417083ANov 22, 1983

Process for the dehydrocyclization of paraffins at low pressure

ELF FRANCE54 citations94

US4330449AMay 18, 1982

Process for preparation of compositions of bitumen polymers and products

ELF FRANCE85 citations93

US5120777AJun 9, 1992

Bitumen/polymer composition exhibiting an adhesiveness which is retained on storage at elevated temperature and process for preparing such a composition

ELF FRANCE45 citations92

US5096684AMar 17, 1992

Process for the synthesis of precursors of molecular sieves of the silicoaluminophosphate type, precursors obtained and their application to obtaining the said molecular sieves

ELF FRANCE112 citations92

US4993734AFeb 19, 1991

Device for controlling a gas circuit of a combustion chamber and a sealing member for its operation

ELF FRANCE39 citations92

US5382612AJan 17, 1995

Process 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 mixes

ELF FRANCE53 citations91

US5268029ADec 7, 1993

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

ELF FRANCE29 citations91

US4890857AJan 2, 1990

Steerable wheels of land vehicles

ELF FRANCE46 citations91

US4772648ASep 20, 1988

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

ELF FRANCE31 citations91

US4653604AMar 31, 1987

Suspension and or shock-absorbing device for a support arm of a vehicle wheel

ELF FRANCE38 citations91

US4650027AMar 17, 1987

Coupling device between a front suspension and a rear suspension of a vehicle

ELF FRANCE55 citations91

US4606309AAug 19, 1986

Device for controlling the combustion chambers exhaust and/or intake for internal combustion engines

ELF FRANCE27 citations91

US4576648AMar 18, 1986

Cationic emulsions of bituminous binders of the bitumen type and their process of preparation

ELF FRANCE35 citations91

US4567222AJan 28, 1986

Process 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 compositions

ELF FRANCE40 citations91

US4416806ANov 22, 1983

Catalyst for production of aromatic hydrocarbons and process for preparation

ELF FRANCE47 citations91

US4847224AJul 11, 1989

Binary zeolitic systems, their synthesis and their utilization

ELF FRANCE29 citations90

US4732480AMar 22, 1988

Interferometric device for detecting gas

ELF FRANCE31 citations90

US5508112AApr 16, 1996

Process for the preparation of bitumen-polymer composition

ELF FRANCE42 citations89

US4708720ANov 24, 1987

Protection of hydrocarbons against the action of microorganisms

ELF FRANCE30 citations89

US4650581AMar 17, 1987

Apparatus for separating a phase dispersed by emulsion or by suspension in a continuous phase

ELF FRANCE31 citations88

US4584064AApr 22, 1986

Device and installations for the distillation by thin layer evaporation particularly of hydrocarbons, and process for operating this device

ELF FRANCE97 citations88

US4565088AJan 21, 1986

Process and apparatus for the detection of changes of composition in a medium with the aid of ultrasound

ELF FRANCE27 citations88

US5007733AApr 16, 1991

Process and device for determining the cloud point of a diesel oil

ELF FRANCE32 citations86

US4681680AJul 21, 1987

Device for the selective and continuous recovery of hydrocarbons present in the form of a sheet at the surface of an aqueous medium

ELF FRANCE26 citations85

US5073309ADec 17, 1991

Device for dispersion of gas in a liquid phase

ELF FRANCE40 citations84

US4785905ANov 22, 1988

Suspension device for a motorcycle front wheel

ELF FRANCE23 citations81

US4574743AMar 11, 1986

Heat generator for heating a fluid by heat exchange through a fluidized bed and a process for implementing same

ELF FRANCE39 citations81

US4753909AJun 28, 1988

Bridged clays of improved thermal stability process for their preparation and utilization as catalysts

ELF FRANCE18 citations78

US4493901AJan 15, 1985

Regeneration process of an aromatization catalyst containing a Group VIII metal on a zeolite

ELF FRANCE24 citations77

US4804495AFeb 14, 1989

Reduced viscosity heavy hydrocarbon composition in form of multiple emulsion and its production

ELF FRANCE19 citations75

US5046590ASep 10, 1991

Braking device for a rotary element

ELF FRANCE13 citations73

US5007497AApr 16, 1991

Arm support device for a rotating element

ELF FRANCE15 citations73

US4805717AFeb 21, 1989

Bracket construction for a motor cycle assembly

ELF FRANCE12 citations73

US4782908ANov 8, 1988

Supporting device for a vehicle driving wheel

ELF FRANCE13 citations73

US4977869ADec 18, 1990

Valve assembly for internal-combustion engines

ELF FRANCE13 citations72

US4973076ANov 27, 1990

Device for adjusting the camber angle of a vehicle

ELF FRANCE16 citations72

US4879326ANov 7, 1989

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

ELF FRANCE7 citations72

US4850327AJul 25, 1989

Device for improving the feed of diesel engines at low temperatures

ELF FRANCE15 citations72

US4834408AMay 30, 1989

Wheel suspensions of land vehicles and especially of steerable wheels

ELF FRANCE18 citations72

US4641849AFeb 10, 1987

Manual actuating device, especially for steering a motorcycle

ELF FRANCE18 citations72

US4611086ASep 9, 1986

Process for hydration of olefins

ELF FRANCE13 citations72

US4583585AApr 22, 1986

System for cleaning tube-type exchangers automatically during operation

ELF FRANCE24 citations72

US4553622ANov 19, 1985

Supporting arm assembly for a driving wheel of an automotive vehicle

ELF FRANCE16 citations72

Showing the top 50 of 94 patents by PatentIndex Score.

ELF FRANCE

Top patents by PatentIndex Score

Suspension-corrective device designed especially for a motorcycle

Motorcycle front wheel suspension device

Suspension device for a vehicle wheel support arm and front-rear coupling system for said suspension

Process 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 compositions

Process for the dehydrocyclization of paraffins at low pressure

Process for preparation of compositions of bitumen polymers and products

Bitumen/polymer composition exhibiting an adhesiveness which is retained on storage at elevated temperature and process for preparing such a composition

Process for the synthesis of precursors of molecular sieves of the silicoaluminophosphate type, precursors obtained and their application to obtaining the said molecular sieves

Coupling device between a steerable wheel and a steering control member

Suspension and steering control device for motorcycle

Counterbalanced piston rotary machine

Device for controlling a gas circuit of a combustion chamber and a sealing member for its operation

Process 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 mixes

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

Steerable wheels of land vehicles

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

Suspension and or shock-absorbing device for a support arm of a vehicle wheel

Coupling device between a front suspension and a rear suspension of a vehicle

Device for controlling the combustion chambers exhaust and/or intake for internal combustion engines

Cationic emulsions of bituminous binders of the bitumen type and their process of preparation

Process 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 compositions

Catalyst for production of aromatic hydrocarbons and process for preparation

Binary zeolitic systems, their synthesis and their utilization

Interferometric device for detecting gas

Process for the preparation of bitumen-polymer composition

Protection of hydrocarbons against the action of microorganisms

Apparatus for separating a phase dispersed by emulsion or by suspension in a continuous phase

Device and installations for the distillation by thin layer evaporation particularly of hydrocarbons, and process for operating this device

Process and apparatus for the detection of changes of composition in a medium with the aid of ultrasound

Process and device for determining the cloud point of a diesel oil

Device for the selective and continuous recovery of hydrocarbons present in the form of a sheet at the surface of an aqueous medium

Device for dispersion of gas in a liquid phase

Suspension device for a motorcycle front wheel

Heat generator for heating a fluid by heat exchange through a fluidized bed and a process for implementing same

Bridged clays of improved thermal stability process for their preparation and utilization as catalysts

Regeneration process of an aromatization catalyst containing a Group VIII metal on a zeolite

Reduced viscosity heavy hydrocarbon composition in form of multiple emulsion and its production

Braking device for a rotary element

Arm support device for a rotating element

Bracket construction for a motor cycle assembly

Supporting device for a vehicle driving wheel

Valve assembly for internal-combustion engines

Device for adjusting the camber angle of a vehicle

Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions

Device for improving the feed of diesel engines at low temperatures

Wheel suspensions of land vehicles and especially of steerable wheels

Manual actuating device, especially for steering a motorcycle

Process for hydration of olefins

System for cleaning tube-type exchangers automatically during operation

Supporting arm assembly for a driving wheel of an automotive vehicle