Patents by Inventor Ikuo Sumina

Ikuo Sumina 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).

  • Coating composition
    Patent number: 4816071
    Abstract: A coating composition comprising a film forming binder and an antifoulingly effective amount of at least one of 3,3,4, 4-tetrachlorotetrahydrothiophene-1,1,-dioxide and 3,3, 4-trichlorotetrahydrothiophene-1,1-dioxide as an effective ingredient is highly useful as an underwater antifouling agent.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: March 28, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takashi Watanabe, Ikuo Sumina