Patents by Inventor Keiso Ohara

Keiso Ohara 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).

  • Method for preparing powdery crystalline cellulose
    Patent number: 5175275
    Abstract: The present invention relates to powdery crystalline cellulose having an average particle size ranging from 3 to 30 .mu.m and an average degree of polymerization ranging from 400 to 1,500. The powdery crystalline cellulose can be prepared according to a method comprising treating a starting cellulose material with a cellulase, subjecting the enzyme-treated cellulose material to acid hydrolysis under mild conditions, and then mechanically pulverizing the hydrolyzed cellulose material. The powdery crystalline cellulose is suitable for various applications of foods, cosmetics, medicines and various industrial products.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: December 29, 1992
    Assignee: Tosco Co., Ltd.
    Inventors: Shozaburo Dobashi, Hisaichiro Uchida, Keiso Ohara