Patents by Inventor Kanji Katsukawa

Kanji Katsukawa 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).

  • Method of making a thermoplastic sheet with cement particles for use on concrete structures
    Patent number: 5271781
    Abstract: A waterproof sheet for concrete structures comprising a sheet made of a thermoplastic synthetic resin, and powder of cement which is pressed against the sheet and adhered to one side surface or both side surfaces of the sheet. There are also disclosed a method of manufacturing a waterproof sheet for concrete structures and a method of applying a waterproof sheet to the concrete structure.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: December 21, 1993
    Assignee: Koken Kaihatsu Co., Ltd.
    Inventors: Takamitsu Anno, Kanji Katsukawa