Patents by Inventor Yosikazu Kosaka

Yosikazu Kosaka 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).

  • Sealing material for preventing water-leakage and method of manufacturing same
    Patent number: 4007152
    Abstract: A sealing material for the prevention of water-leakage used in, for example, waterproofed fabric and various building and construction materials is provided.The sealing material consists of (a) a water-insoluble partially saponified polyvinyl alcohol having a saponification degree of 35 to 65% by mole and a number average polymerization degree of 500 to 3,500, and (b) 5 to 100 parts by weight, based on 100 parts by weight of said partially saponified polyvinyl alcohol, of a mixture of glycerin and the glyceryl ester of a carboxylic acid.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: February 8, 1977
    Assignee: Toray Industries, Inc.
    Inventors: Yosikazu Kosaka, Makoto Kounosu, Masaaki Kondo