Patents by Inventor Katuji Kitagawa

Katuji Kitagawa 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).

  • Powder coating composition comprising conventional epoxides with crystalline epoxides and curing agents
    Patent number: 5414058
    Abstract: A powder coating composition includes one or more crystalline substances the lowest melting point of which is Mp and one or more non-crystalline substances the lowest glass transition point of which is Tg and is lower than Mp, wherein the crystalline and non-crystalline substances are selected from epoxy resins and curing agents and bonded to each other. The bonding is effected by maintaining a powdery mixture containing the crystalline and non-crystalline substances at a temperature higher than Tg but lower than Mp and the softening point of any of the the non-crystalline substances, optionally under a pressure, and cooling and pulverizing the resulting mixture.
    Type: Grant
    Filed: July 15, 1993
    Date of Patent: May 9, 1995
    Assignee: Somar Corporation
    Inventors: Kazuya Ono, Tetsuo Miyake, Mikio Osa, Katuji Kitagawa, Masao Kubo