Patents by Inventor Katsuharu Ogishima

Katsuharu Ogishima 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 and apparatus for continuous production of polycarbonates
    Patent number: 3974126
    Abstract: A heat resistant and impact resistant polycarbonate having a narrow distribution of molecular weight is continuously produced by reacting chloroformate ester, prepared in advance by reacting alkaline solution of dioxy compound in a turbulent flow of the two solutions while cooling and subsequently reacting the mixture concurrently in a laminar flow after the viscosity of the mixture has become significant.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: August 10, 1976
    Assignee: Idemitsu, Kosan Kabushiki-Kaisha
    Inventors: Yoshihiro Narita, Hideo Konuma, Hiroshi Nishitani, Norio Komori, Katsuharu Ogishima