Patents by Inventor Yoshiomi Saito

Yoshiomi Saito 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).

  • Vulcanizable rubber composition with unsaturated and metal compounds and organic peroxides
    Patent number: 5756586
    Abstract: This invention relates to a vulcanizable rubber composition obtained by compounding, into an ethylenically unsaturated nitrile-conjugated diene copolymer rubber, a zinc compound, an .alpha., .beta.-ethylenically unsaturated carboxylic acid, a compound of a 2A Group metal of the periodic table and an organic peroxide. The vulcanizable rubber composition of this invention can provide a vulcanized rubber having excellent heat resistance and oil resistance and moreover possessing high tensile stress or stably exhibiting high tensile strength without being affected by kneading conditions, and is hence suitable for use as a rubber material for toothed belts and the like.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: May 26, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Koichi Nishimura, Yoshiomi Saito, Kazuyoshi Nakajima, Atsushi Tanaka, Yasuaki Serizawa
  • Curable rubber composition
    Patent number: 4990570
    Abstract: Disclosed is a curable rubber composition comprising (a) 100 parts by weight of an ethylenically unsaturated nitrile/conjugated diene type highly saturated rubber in which the content of conjugated diene units in the polymer chain is not higher than 30% by weight, (b) 10 to 100 parts by weight of zinc salt of methacrylic acid, (c) 5 to 50 parts by weight of silicic anhydride and (d) 0.2 to 10 parts by weight of an organic peroxide. The curable rubber composition provides a cured product having an excellent strength, abrasion resistance, and compression set.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: February 5, 1991
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yoshiomi Saito, Akio Fujino, Atsumi Ikeda
  • Curable rubber composition
    Patent number: 4983678
    Abstract: Disclosed is a curable rubber composition comprising (a) 100 parts by weight of a rubber comprising 90 to 60% by weight of any ethylenically unsaturated nitrile/conjugated diene type highly saturated rubber and 10 to 40% by weight of an ethylene/propylene copolymer rubber, (b) 10 to 100 parts by weight of a zinc salt of methacrylic acid, and (c) 0.2 to 10 parts by weight of an organic peroxide. The curable rubber composition provides a cured product having an excellent strength, and ozone resistance.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: January 8, 1991
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yoshiomi Saito, Akio Fujino, Atsumi Ikeda
  • Medical catheter
    Patent number: 4146033
    Abstract: A novel medical catheter, formed of a rubber component comprising substantially a homopolymer of epichlorohydrin and fillers comprising silica and/or silicates, possesses sufficient tensile strength and flexibility and meets the sanitary requirements.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: March 27, 1979
    Assignees: Hisamitsu Pharmaceutical Co., Inc., Nippon Zeon Co., Ltd.
    Inventors: Hiroyuki Ide, Hiroharu Kakiuchi, Hirotsune Igimi, Yoshiomi Saito, Masahiro Shimizu