Patents by Inventor Yoshihiko Kitawaga

Yoshihiko Kitawaga 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).

  • Process for producing copolymerized resins
    Patent number: 4129557
    Abstract: A novel copolymer resin having excellent compatibility with rubber and plastics, stable to air, easily soluble in the hydrocarbon solvents and free of gel, said resin being obtained either (1) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof and one or more of the substances selected from the hydroxystyrene derivatives, or (2) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof, one or more of the substances selected from the codimers of cyclopentadiene and/or alkyl-substituted compounds thereof and chain conjugated diolefins having 4 to 5 carbon atoms, and one or more of the substances selected from the hydroxystyrene derivatives. There are also provided compositions comprising said resin and rubber or thermoplastic high-molecular weight substances.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: December 12, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Ken-ichi Kudo, Yoshihiko Kitawaga, Teruhisa Koyama, Akira Takata, Shuichi Kanagawa, Tetsuo Yamaguchi