Patents by Inventor Sumio Umemoto

Sumio Umemoto 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 casting urethane elastomer on metal
    Patent number: 4639384
    Abstract: A method for adhering an urethane elastomer to a metal is disclosed, and comprises applying a thermosetting resin containing a flaky inorganic filler to a surface of a metal matrix, curing the thermosetting resin layer, applying an isocyanate-terminated prepolymer thereon, curing the prepolymer layer, and casting an urethane elastomer stock solution over the cured laminate. The adhesion obtained is excellent in durability against acids.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: January 27, 1987
    Assignee: The Toyo Rubber Industry Co., Ltd.
    Inventors: Sumio Umemoto, Eiichi Hattori, Ryutaro Kamakari