Patents by Inventor Akinobu Okamura

Akinobu Okamura 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).

  • Treatment for rubber-reinforcing fibers, reinforcing fibers, and reinforced rubbers
    Patent number: 6262154
    Abstract: A reinforcing fiber for a rubber product that has excellent heat resistance, water resistance and resistance to flex fatigue without undergoing a complicated production process and a treatment agent therefore. This treatment agent comprises a rubber latex, a resorcin-formaldehyde water-soluble condensate and triazine thiol.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: July 17, 2001
    Assignees: Nippon Sheet Glass Co., Ltd., Nippon Zeon Co., Ltd.
    Inventors: Akinobu Okamura, Takuo Hamaguchi, Mitsuharu Akiyama, Osamu Mori, Mitsugu Ishihara
  • Water-based liquid for treating glass fiber cord for reinforcement of rubber, glass fiber cord for reinforcing rubber, and reinforced rubber product
    Patent number: 5368928
    Abstract: A water-based treating liquid for a rubber-reinforcing glass fiber cord, which contains as a solid component a composition consisting essentially of;(1) a rubber latex(2) an alkylated chlorosulfonated polyethylene latex, and(3) a water-soluble resorcinol-formaldehyde condensate,wherein, based on the total amount of the components (1) and (2), the amount of the component (2) is 10 to 70% by weight and the amount of the component (3) is 5 to 20% by weight;a glass fiber cord for reinforcement of a rubber, which contains the above composition as a coating component; anda rubber product reinforced with the above glass fiber cord, the rubber product being excellent in fatigue resistance under heat and a flexing force.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: November 29, 1994
    Assignee: Nippon Glass Fiber Co., Ltd.
    Inventors: Akinobu Okamura, Masato Sekiguchi
  • Liquid composition for glass fiber impregnation
    Patent number: 5236742
    Abstract: A liquid composition for glass fiber impregnation, characterized in that (A) it comprises (1) a resorcinol-formaldehyde resin, (2) a butadiene/styrene/vinylpyridine terpolymer, and (3) chlorosulfonated polyethylene, and (B) based on the total solids of the components (1), (2) and (3), the proportion of component (1) is 2 to 15% by weight, the proportion of component (2) is 15 to 80% by weight, and the proportion of component (3) is 15 to 70% by weight; and a glass fiber cord having a solid coating derived from the liquid composition. The glass fiber cord is useful as a reinforcing material in products, such as timing belts, which undergo both heat and an external force during travelling.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: August 17, 1993
    Assignee: Nippon Glass Fiber Co., Ltd.
    Inventors: Masato Sekigushi, Akinobu Okamura
  • Liquid composition for glass fiber impregnation
    Patent number: 5154975
    Abstract: A liquid composition for glass fiber impregnation, characterized in that (A) it comprises (1) a resorcinol-formaldehyde resin, (2) a butadiene/styrene/vinylpyridine terpolymer, and (3) chlorosulfonated polyethylene, and (B) based on the total solids of the components (1), (2) and (3), the proportion of component (1) is 2 to 15% by weight, the proportion of component (2) is 15 to 80% by weight, and the proportion of component (3) is 15 to 70% by weight; and a glass fiber cord having a solid coating derived from the liquid composition. The glass fiber cord is useful as a reinforcing material in products, such as timing belts, which undergo both heat and an external force during travelling.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: October 13, 1992
    Assignee: Nippon Glass Fiber Co., Ltd.
    Inventors: Masato Sekiguchi, Akinobu Okamura
  • Adhesive for bonding rubber to fibers
    Patent number: 5077127
    Abstract: An adhesive for bonding a nitrile group-containing highly saturated rubber to glass fibers or organic synthetic fibers, which comprises a nitrile group-containing highly saturated rubber latex having an iodine number of not more than 120 and a resoncinol/formaldehyde resin.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: December 31, 1991
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Osamu Mori, Motofumi Oyama, Hiroshi Hisaki, Masato Sekiguchi, Akinobu Okamura, Haruhiro Tanabe
  • Adhesive for bonding rubber to fibers
    Patent number: 5017639
    Abstract: An adhesive for bonding a nitrile group-containing highly saturated rubber to glass fibers or organic synthetic fibers, which comprises a nitrile group-containing highly saturated rubber latex having an iodine number of not more than 120 and a resorcinol-formaldehyde resin.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: May 21, 1991
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Osamu Mori, Motofumi Oyama, Hiroshi Hisaki, Masato Sekiguchi, Akinobu Okamura, Haruhiro Tanabe