Patents by Inventor Ryozo Sakata

Ryozo Sakata 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).

  • Urethane modified polyisocyanurate foam surfaced with aluminum foil or sheet
    Patent number: 4292353
    Abstract: A laminate having excellent flameproofing and low-smoke development is disclosed. The laminate comprises an urethane modified polyisocyanurate foam as a core material and an aluminum foil or sheet as a surface material piled on at least one surface of the foam through a self-adhesion of the foam and passes Grade 2 incombustibility according to Japanese Industrial Standard (JIS) A-1321 combustion test.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: September 29, 1981
    Assignee: Bridgestone Tire Co., Ltd.
    Inventors: Takashi Ohashi, Toru Okuyama, Akira Suzuki, Katsuhiko Arai, Minoru Kojima, Yoshiko Taniguchi, Masako Yoshida, Ryozo Sakata, Hideki Sugihara, Masashi Dobashi, Hirobumi Ohwada
  • Process for producing a rigid polyurethane foam having excellent flame retardance and low-smoke development
    Patent number: 4205136
    Abstract: A process for producing a rigid polyurethane foam having excellent flame retardance and low-smoke development is disclosed. When the rigid polyurethane foam is produced by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent, a surfactant, a catalyst and other additives, 3-methylpentane-1,3,5-triol is used as a part of the polyhydroxyl compound.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: May 27, 1980
    Assignee: Bridgestone Tire Company Limited
    Inventors: Takashi Ohashi, Minoru Kojima, Masako Yoshida, Toru Okuyama, Ryozo Sakata
  • Method for producing heat resistant and flame resistant polyisocyanurate foams using little or no organosilicone surfactant
    Patent number: 4189541
    Abstract: Polyisocyanurate foams having excellent heat resistance and flame resistance are produced by using no common organic silicone surfactant or using less than 0.2% by weight based on an organic polyisocyanate, of said organic silicone surfactant, when producing a polyisocyanurate foam by reacting an organic polyisocyanate, a blowing agent and a catalyst for trimerizing isocyanate and if necessary a surfactant, a modifier and the other additives.
    Type: Grant
    Filed: June 20, 1978
    Date of Patent: February 19, 1980
    Assignee: Bridgestone Tire Company Limited
    Inventors: Takashi Ohashi, Toru Okuyama, Katsuhiko Arai, Akira Suzuki, Minoru Kojima, Yoshiko Taniguchi, Masako Yoshida, Ryozo Sakata
  • Excellent flame-and smoke-retardant non-shrinkable polyurethane foam
    Patent number: 4145318
    Abstract: An excellent flame- and smoke-retardant non-shrinkable polyurethane foam is prepared by reacting a polyhydroxyl compound consisting of(A) a polyol having at least two hydroxyl groups and having a molecular weight of from 1,000 to 10,000, and(B) an aliphatic amino alcohol, the amount of which is 2.1 to 8.0 equivalents per hydroxyl group of the polyol (A) with an organic polyisocyanate in the presence of water and/or other blowing agents, catalysts and surfactants.The polyurethane foam thus obtained has high resilience together with an improved S.A.G. factor.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: March 20, 1979
    Assignee: Bridgestone Tire Company Limited
    Inventors: Takashi Ohashi, Toru Okuyama, Katsuhiko Arai, Yoshiko Taniguchi, Masumi Saito, Ryozo Sakata