Patents by Inventor Yoshii Hitofude

Yoshii Hitofude 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).

  • Antioxidant wax for rubber
    Patent number: 4877456
    Abstract: The present invention relates to an antioxidant was for rubber having a capacity to prevent the rubber from aging over a whole range from lower to higher temperatures and also providing excellent appearance and quality for the rubber products.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: October 31, 1989
    Assignee: Nippon Seiro Company, Limited
    Inventors: Kaoru Chikamune, Manabu Tokuda, Kazuo Inoue, Kyoshi Utsunomiya, Yoshii Hitofude