Patents by Inventor Marc Verhelst

Marc Verhelst 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).

  • Halogenated, high molecular weight, gel-free isobutene copolymers with elevated double bond contents
    Patent number: 6545100
    Abstract: The present invention relates to halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers, in particular to halogenated, low-gel, high molecular weight butyl rubbers, and halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and a process for their preparation.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: April 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Langstein, Martin Bohnenpoll, Anthony Sumner, Marc Verhelst
  • Rubber composition for tire treads
    Publication number: 20020132904
    Abstract: The present invention relates to a rubber composition for a tire tread particularly in a pneumatic tire characterized in that said rubber composition comprises a low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a low-gel, high molecular weight butyl rubber, or a low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and/or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a halogenated, low-gel, high molecular weight butyl rubber, or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt.
    Type: Application
    Filed: December 10, 2001
    Publication date: September 19, 2002
    Inventors: Gerhard Langstein, Martin Bohnenpoll, Anthony Sumner, Marc Verhelst
  • Rubber composition for tire tube
    Publication number: 20020115766
    Abstract: The present invention relates to a rubber composition for a tire for a tire tube, and more particularly, to a rubber composition for a tire tube of motor car tire. The rubber composition comprises a low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a low-gel, high molecular weight butyl rubber, or a low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and/or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a halogenated, low-gel, high molecular weight butyl rubber, or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.
    Type: Application
    Filed: December 10, 2001
    Publication date: August 22, 2002
    Inventors: Gerhard Langstein, Martin Bohnenpoll, Anthony Sumner, Marc Verhelst
  • Rubber composition for tire inner liner
    Publication number: 20020111414
    Abstract: The present invention relates to a rubber composition for a tire inner liner, and more particularly, to a rubber composition for an inner liner of a tubeless tire characterized in that said rubber composition comprises a low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a low-gel, high molecular weight butyl rubber, or a low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and/or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a halogenated, low-gel, high molecular weight butyl rubber, or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.
    Type: Application
    Filed: December 10, 2001
    Publication date: August 15, 2002
    Inventors: Gerhard Langstein, Martin Bohnenpoll, Anthony Sumner, Marc Verhelst
  • Halogenated, high molecular weight, gel-free isobutene copolymers with elevated double bond contents
    Publication number: 20020107333
    Abstract: The present invention relates to halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers, in particular to halogenated, low-gel, high molecular weight butyl rubbers, and halogenated, low-gel, high molecular weight isoolefin multiolefin copolymers synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol %, a molecular weight Mw of greater than 240 kg/mol and a gel content of less than 1.2 wt. % and a process for their preparation.
    Type: Application
    Filed: December 10, 2001
    Publication date: August 8, 2002
    Inventors: Gerhard Langstein, Martin Bohnenpoll, Anthony Sumner, Marc Verhelst