Patents by Inventor Akikatsu Kanayama

Akikatsu Kanayama 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 paste-blending vinyl chloride resin
    Patent number: 4385163
    Abstract: A process for producing a paste-blending vinyl chloride resin, which comprisesinitiating suspension polymerization of a vinyl chloride monomer or a mixture of it with a monomer copolymerizable therewith in an aqueous medium in the presence of a water-soluble protein as a suspending agent;adding a proteolytic enzyme to the polymerization system at any point in a time period running from the time when the polymerization conversion reaches 10% by weight to the time when the polymerization reaction is not yet complete; andthereafter continuing the suspension polymerization until the polymerization reaction is completed.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: May 24, 1983
    Assignee: Nippon Zeon Co. Ltd.
    Inventors: Mamoru Nakamura, Akikatsu Kanayama
  • Process for removing water-soluble protein from vinyl chloride resin
    Patent number: 4355146
    Abstract: A process for producing a blending vinyl chloride resin, which comprises subjecting a vinyl chloride monomer or a mixture of vinyl chloride and a monomer copolymerizable therewith to suspension polymerization in an aqueous medium using a water-soluble protein as a suspending agent, and treating the resulting polymer with a proteolytic enzyme.
    Type: Grant
    Filed: April 29, 1980
    Date of Patent: October 19, 1982
    Assignee: Nippon Zeon Co. Ltd.
    Inventors: Mamoru Nakamura, Akikatsu Kanayama