Patents by Inventor Yasusuke Ochi

Yasusuke Ochi 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 dispersion agent
    Patent number: 4759802
    Abstract: A hydraulic cement composition is effectively dispersed with the use as a dispersion agent of a reaction product obtained by oxidizing and polymerizing a condensate of formaldehyde with a naphthalenesulfonic acid salt and/or an alkylnaphthalenesulfonic acid salt to produce a constitutional unit which is derived by elimination of a methylene group, hydroxyzation and condensation polmerization, or oxidation and ring-opening of the naphthalene ring.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: July 26, 1988
    Assignee: Kao Corporation
    Inventors: Yasusuke Ochi, Tatsuya Mizunuma, Kimio Kurosaka, Tatsuo Izumi, Shuichi Fujita