Patents by Inventor Kakusaburo Nakanishi

Kakusaburo Nakanishi 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).

  • Vinyl chloride -EPDM resin compositions
    Patent number: 4021508
    Abstract: This invention relates to a vinyl chloride resin composition excellent in weather resistance and impact resistance. More particularly, the invention pertains to a weather resistant and impact resistant vinyl chloride resin composition low in cost and markedly improved in processability which comprises a vinyl chloride resin and a vinyl chloride graft copolymer prepared according to a specific process by graft-copolymerizing a vinyl chloride monomer on an ethylene-propylene-diene copolymer.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: May 3, 1977
    Assignee: Ryo-Nichi Co., Ltd.
    Inventors: Kakusaburo Nakanishi, Tatsuro Yoshida, Kyoku Nakatubo
  • Process for producing vinyl chloride graft copolymers
    Patent number: 3978162
    Abstract: A process for producing a vinyl chloride grapht copolymer, wherein vinyl chloride is graft polymerized onto an ethylene-propylene-diene copolymer to produce a vinyl chloride graft copolymer containing 10 to 60% by weight of the ethylene-propylene-diene copolymer, carried out in the form of suspension polymerization in aqueous phase in the presence of an aliphatic alcohol of not less than 8 carbon atoms.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: August 31, 1976
    Assignee: Ryo-Nichi Co., Ltd.
    Inventors: Kakusaburo Nakanishi, Tatsuro Yoshida