Patents by Inventor Takeyoshi Usui

Takeyoshi Usui 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).

  • Heat-resistant, oil-resistant rubber composition
    Patent number: 5391627
    Abstract: A rubber composition comprising 100 parts by weight of an ethylenically unsaturated nitrile-conjugated diene high-saturation copolymer rubber containing 20 weight % or less of conjugated diene units, and 1-100 parts by weight of an unsaturated carboxylic acid metal salt having the general formula: ##STR1## wherein R and R' represent aliphatic or aromatic hydrocarbon groups or a hydrogen atom, which may be the same or different from each other, Me represents a metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Ti, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, Hg, Al, Sn, Pb and Sb, and n is an integer of 2-4.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: February 21, 1995
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Yamashita Rubber Co., Ltd, Nippon Zeon Co., Ltd.
    Inventors: Junichi Araki, Masayuki Tamura, Takahiro Naka, Nobuhiro Saito, Hiroshi Kitagawa, Takeyoshi Usui, Shigeru Sato