Patents by Inventor Shigeru Sumitomo

Shigeru Sumitomo 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).

  • Blowing agent powder and process for producing the same
    Patent number: 6399201
    Abstract: A powder comprising a blowing agent powder core which is coated with at least one oil-like substance on its surface, and a process for producing a powder comprising a blowing agent powder core which is coated with at least one oil-like substance on its surface, comprising the following steps (a) and (b): (a) adding at least one oil-like substance in the form of a mist to a blowing agent powder; and (b) mixing the oil-like substance with the blowing agent powder under such mixing conditions that the blowing agent powder is less susceptible to pulverization.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: June 4, 2002
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Tsukasa Maekawa, Toshinori Takao, Sadafumi Shono, Chiaki Yasumaru, Shigeru Sumitomo, Nobuyuki Ueda, Yoshifumi Tachi
  • Substantially anhydrous foaming agent and process for producing the same
    Patent number: 6355698
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same. The blowing agent of the present invention is substantially anhydrous blowing agent, and it is obtained by treating a blowing agent with a surface-treating agent capable of removing water from the blowing agent, followed by optionally heating during or after the treatment.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: March 12, 2002
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Tsukasa Maekawa, Nobuyuki Ueda, Sadafumi Shono, Yoshifumi Tachi, Shigeru Sumitomo
  • SUBSTANTIALLY ANHYDROUS BLOWING AGENT AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20020025988
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same.
    Type: Application
    Filed: March 22, 2000
    Publication date: February 28, 2002
    Inventors: TSUKASA MAEKAWA, NOBUYUKI UEDA, SADAFUMI SHONO, YOSHIFUMI TACHI, SHIGERU SUMITOMO