Patents by Inventor Kotarou Kishimura

Kotarou Kishimura 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).

  • Processes for preparing aromatic polycarbonates
    Patent number: 5606007
    Abstract: According to the present invention, there is provided an improvement which comprises adding an acid compound and if necessary an epoxy compound to a reaction product resulting from melt polycondensation reaction of an aromatic dihydroxy compound with a carbonic acid diester in the presence of an alkaline compound catalyst.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: February 25, 1997
    Assignee: General Electric Company
    Inventors: Takeshi Sakashita, Tomoaki Shimoda, Hideyuki Itoi, Takashi Nagai, Kotarou Kishimura
  • Polycarbonate, polyestercarbonate resin compounds and preparing methods thereof
    Patent number: 5187242
    Abstract: A polycarbonate composition which contains 60-95 parts by weight of a polycarbonate with a terminal hydroxyl group concentration of 5-95 mol % and 40-5 parts by weight of polyester.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: February 16, 1993
    Assignee: General Electric Company
    Inventors: Takeshi Sakashita, Tomoaki Shimoda, Takashi Nagai, Kotarou Kishimura