Patents by Inventor Sumio Otani

Sumio Otani 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).

  • Micro-porous sheet
    Patent number: 4171987
    Abstract: A micro-porous sheet having excellent thermostability which contains a cellulose ester as a basic component and 0.1 to 20 wt% of a cellulose ether based on the cellulose ester.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: October 23, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaru Horiguchi, Nobuo Hiratsuka, Sumio Otani