Patents by Inventor Yasuhiko Otawa

Yasuhiko Otawa 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).

  • Chlorinated rubber
    Patent number: 4764562
    Abstract: A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney viscosity, ML.sub.1+4 (121.degree. C.), of 10 to 190 is obtained by chlorinating an ethylene/alpha-olefin/non-conjugated diene copolymer rubber containing 5-vinyl-2-norbornene as the non-conjugated diene. The chlorinated rubber has excellent processability in roll milling, extrusion, etc.
    Type: Grant
    Filed: October 30, 1986
    Date of Patent: August 16, 1988
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tetsuo Tojo, Takashi Nakahara, Yasuhiko Otawa, Katsuo Okamoto