Patents by Inventor Hideaki Yamaguchi

Hideaki Yamaguchi 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).

  • Copolymerization of ethylene and cycloolefin isomerized from endo-form to exo-form
    Patent number: 5106931
    Abstract: This invention is to provide a novel process for the isomerization of a cycloolefin having an endo form to a cycloolefin having an exo form. The resulting isomer mixture has a novel composition, and a random copolymer produced from the above compositionally novel isomer mixture and ethylene has an excellent heat resistance and mechanical strength.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: April 21, 1992
    Assignee: Mitsui Petrochemical Industries Ltd.
    Inventors: Toshihiro Sagane, Hideaki Yamaguchi, Shuji Minami, Akira Mizuno, Hiroo Wamura
  • Process for producing cycloolefin random copolymer
    Patent number: 4935475
    Abstract: A process for producing a cycloolefin random copolymer, which comprises(1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) a cycloolefin such as octahydronaphthalenes and bicyclo[2,2,1]hept-2-ene in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of a cycloolefin random copolymer, and(2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: June 19, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Kotaroh Kishimura, Hideaki Yamaguchi, Syuji Minami