Patents by Inventor Fumio Kasajima

Fumio Kasajima 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 an open cell foam
    Patent number: 4142956
    Abstract: A process for producing an open cell foam by irradiating a composition comprising (a) a thermoplastic resin polymer blend including 1,2-polybutadiene as one component, (b) a photosensitizing agent and (c) a thermally decomposable foaming agent, with ultraviolet light having a wavelength ranging from about 254 to about 400 m.mu. to thereby cross-link mainly the 1,2-polybutadiene, and subsequently foaming the composition at a temperature higher than the softening point of the 1,2-polybutadiene and that of the thermoplastic resin polymer blended therewith and higher than the decomposition temperature of the foaming agent.
    Type: Grant
    Filed: June 21, 1977
    Date of Patent: March 6, 1979
    Assignee: Takiron Co., Ltd.
    Inventors: Yasuo Shikinami, Kosuke Iida, Kunihiro Hata, Fumio Kasajima