Patents by Inventor Olivier Denizart

Olivier Denizart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pipes, based on polyamide and polyolefin, for gas transmission and/or distribution
    Patent number: 6616191
    Abstract: The present invention relates to pipes for the transmission and/or distribution of combustible gases, and liquefied gases, comprising a polyethylene layer and a polyamide inside and/or outside layer. These pipes may advantageously be connected together by adhesively bonded sleeves and thus form medium-pressure and low-pressure gas distribution and transmission networks or else they may be installed inside already existing metal pipes. These pipes may be manufactured by coextrusion.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 9, 2003
    Assignee: Atofina
    Inventors: Jean-Luc Beal, Patrick Dang, Olivier Denizart
  • Multilayered article including a vulcanized elastomer associated directly with a thermoplastic
    Patent number: 6576342
    Abstract: Multilayered article including a functionalized and vulcanized elastomer adherent by itself to a thermoplastic chosen from polyamides, PBT, mixtures containing polyvinylidene fluoride and ethylene/vinyl alcohol and ethylene/tetrafluoroethylene copolymers. Composite tubular article made up of an outer sheath of vulcanized elastomer adherent to a hydrocarbon-barrier thermoplastic or associated with an inner layer for producing imperviousness.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: June 10, 2003
    Assignee: Elf Atochem S.A.
    Inventors: Martine Cerf, Olivier Denizart, Christian Dousson
  • Pipes for conveying drinking water
    Patent number: 6511724
    Abstract: The invention relates to pipes for conveying drinking water, including a main layer made of polyolefin covered on the outside with a layer of a thermoplastic polymer which is impervious to hydrocarbons, such as, for example, polyamides, polyvinylidene fluoride, ethyl/vinyl alcohol copolymers or polyesters. These pipes are particularly useful for pipes buried in soils that may be contaminated with hydrocarbons.
    Type: Grant
    Filed: March 8, 1996
    Date of Patent: January 28, 2003
    Assignee: ATOFINA
    Inventors: Daniel Siour, Olivier Denizart
  • Pipes for conveying drinking water
    Patent number: 6413602
    Abstract: The invention relates to pipes for conveying drinking water, including a main layer made of polyolefin covered on the outside with a layer of a thermoplastic polymer which is impervious to hydrocarbons, such as, for example, polyamides, polyvinylidene fluoride, ethyl/vinyl alcohol copolymers or polyesters. These pipes are particularly useful for pipes buried in soils that may be contaminated with hydrocarbons.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: July 2, 2002
    Assignee: Atofina
    Inventors: Daniel Siour, Olivier Denizart
  • PIPES, BASED ON POLYAMIDE AND POLYOLEFIN, FOR GAS TRANSMISSION AND/OR DISTRIBUTION
    Publication number: 20020036405
    Abstract: The present invention relates to pipes for the transmission and/or distribution of combustible gases, and liquefied gases, comprising a polyethylene layer and a polyamide inside and/or outside layer. These pipes may advantageously be connected together by adhesively bonded sleeves and thus form medium-pressure and low-pressure gas distribution and transmission networks or else they may be installed inside already existing metal pipes.
    Type: Application
    Filed: September 22, 1997
    Publication date: March 28, 2002
    Inventors: JEAN-LUC BEAL, PATRICK DANG, OLIVIER DENIZART
  • PIPES FOR CONVEYING DRINKING WATER
    Publication number: 20010008663
    Abstract: The invention relates to pipes for conveying drinking water, including a main layer made of polyolefin covered on the outside with a layer of a thermoplastic polymer which is impervious to hydrocarbons, such as, for example, polyamides, polyvinylidene fluoride, ethyl/vinyl alcohol copolymers or polyesters. These pipes are particularly useful for pipes buried in soils that may be contaminated with hydrocarbons.
    Type: Application
    Filed: March 22, 1999
    Publication date: July 19, 2001
    Inventors: DANIEL SIOUR, OLIVIER DENIZART
  • Polyamide-based pipes for conveying petrol
    Patent number: 6177162
    Abstract: The invention relates to a pipe with an internal layer, which includes a mixture of polyamide and of polyolefin with a polyamide matrix, an external layer, which includes a polyamide, and optionally an EVOH layer between the said external and internal layers. These pipes are particularly impervious to alcohol-containing petrols.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: January 23, 2001
    Assignee: Atofina
    Inventors: Daniel Siour, Olivier Denizart, Bruno Echalier
  • Petrol supply tube
    Patent number: 6041826
    Abstract: Polyamide-based petrol supply tube, especially for engines, characterized in that it comprises an outer layer of polyamide, a middle layer of fluoropolymer, preferably of PVDF, and an inner layer of polyamide, these layers being respectively bonded to each other by layers of adhesive bonding agent.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: March 28, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Serge Lorek, Olivier Denizart, Daniel Siour