Patents by Inventor Yasuo Ieki

Yasuo Ieki 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).

  • Patent number: 5055519
    Abstract: Thermoplastic elastomer composition characterized by excellent oil resistance while preserving high tear resistance and tension pull resistance comprises non-functionalized block copolymer of aromatic vinyl compound and conjugated diene or selectively hydrogenated product thereof (e.g. styrene-butadiene-styrene block copolymer), rubber polymer having at least one functional group selected from the group consisting of carboxyl, amino, epoxy and hydroxyl (e.g. acrylonitrile-butadiene copolymer containing a carboxyl group as a reactive functional group), and reactive aromatic vinyl polymer having a functional group which is reactive with the functional group of the rubber (e.g. reactive polystyrene containing 1% by weight oxazolinyl group when the rubber polymer is carboxyl group containing acrylonitrile-butadiene copolymer).
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: October 8, 1991
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Hisao Ono, Masanobu Nagano, Yasuo Ieki, Takumi Miyachi