Patents by Inventor Ryozo Tanizawa

Ryozo Tanizawa 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 resin-based composition for floppy disc jacket
    Patent number: 4628070
    Abstract: The invention provides a formulation of a vinyl chloride resin-based composition suitable for preparing floppy disc jackets having high heat resistance with a Clash-Berg temperature of 75.degree. C. or higher comprising, as the essential components, (A) a copolymer of viny chloride with a N-substituted maleimide as the comonomer, optionally in combination with a homopolymeric polyvinyl chloride resin, (B) an impact-strength improving agent which is preferably a vulcanizable synthetic rubber and (C) carbon black.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: December 9, 1986
    Assignee: Shin Etsu Chemical Co., Ltd.
    Inventors: Tohru Yokota, Kaname Inoue, Ryozo Tanizawa, Hideyuki Asou, Hajime Kitamura
  • Formable vinyl chloride-based resin composition
    Patent number: 4563482
    Abstract: The invention proposes a foamable vinyl chloride-based resin composition capable of giving a shaped article having a cellular foamed structure and a beautiful surface with metallic luster. The composition comprises (a) 100 parts by weight of a vinyl chloride-based resin compound of a transparency formulation having a specified transparency, (b) 0.1-5 parts by weight of a powder of a metal or alloy having a specified average particle diameter, (c) 0.01-2 parts by weight of an organic dye or pigment and (d) 0.1-5 parts by weight of a blowing agent.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: January 7, 1986
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Ryozo Tanizawa, Takeji Yanagisawa