Patents by Inventor Masako Yoshida

Masako Yoshida 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).

  • 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