Patents by Inventor Masahide Tsukagawa

Masahide Tsukagawa 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).

  • Cement composition for underwater concreting
    Patent number: 4707188
    Abstract: A cement composition is suitable for underwater concreting and comprises 100 parts by weight of cement and 0.1 to 2.0 parts by weight of carboxymethyl hydroxyethyl cellulose.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: November 17, 1987
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kenji Tsuda, Nobuyoshi Matsumoto, Masahide Tsukagawa