Patents by Inventor Shigeyuki Haruhata

Shigeyuki Haruhata 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).

  • Halogen-containing polycarbonate resin and process for producing same
    Patent number: 4308373
    Abstract: A halogen-containing polycarbonate resin is formed by co-polymerizing:(a) 15 to 55 parts by weight of a polycarbonate oligomer with terminal chloroformate groups, having a number average molecular weight of 500 to 10,000 and containing no aromatic halogen or less than 4% by weight of aromatic halogen,(b) 20 to 80 parts by weight of a halogen-containing polycarbonate oligomer with terminal chloroformate groups, having a number average molecular weight of 1,000 to 10,000 and containing 6 to 30% by weight aromatic halogen, and(c) 5 to 25 parts by weight of bisphenol A.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: December 29, 1981
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Hazime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura, Shigeyuki Haruhata