Patents by Inventor Katsuto Seki

Katsuto Seki 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 for producing phenol resin foams and method of making foamed laminates
    Patent number: 5008297
    Abstract: In a method for producing resol type phenol resin foams by using starting material for the foams prepared by blending a resol type phenol resin, a blowing agent and a catalyst, a low molecular weight resol type phenol resin with the number average molecular weight of less than 200 and a high molecular weight resol type phenol resin with the number average molecular weight of greater than 200 are mixed at a weight ratio of from 5/95 to 80/20 and used as the resol type phenol resin. The resol type phenol resin foams are excellent in adhesion, fire-proofness capable of foaming cure in a short time and useful for sprayed-in-place foaming, etc. The phenol resin foams produced by the invention are capable of integral foaming with rigid urethane resin foam layer into foamed laminates of excellent thermal insulation, fire-proofness, etc.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: April 16, 1991
    Assignee: Bridgestone Corporation
    Inventors: Akihiro Maruyama, Munehiko Kato, Takumi Ishiwaka, Katsuto Seki, Takashi Ohashi