Patents by Inventor Masaharu Umebayashi

Masaharu Umebayashi 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).

  • Filler for degradable plastics and process for producing the same
    Patent number: 5264030
    Abstract: In order to provide a filler for degradable plastics which can simplify the stages for producing a degradable plastic, give effective plastic-degradability, and stabilize the quality of the plastic article, the filler is used as a carrier substance and effective biodegradable and/or photodegradable components are adsorbed on the surfaces of the filler particles via a surface treating agent.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 23, 1993
    Assignee: Nittetsu Mining Co., Ltd.
    Inventors: Katsuyuki Tanabe, Masaharu Umebayashi, Atsushi Ugomori, Seiji Asaba