Patents by Inventor Hachiro Hirai

Hachiro Hirai 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).

  • Process for producing granule coated with tannic acid metal chelate compound
    Patent number: 4407863
    Abstract: A granule coated with a tannic acid metal chelate compound is produced by granulating granular cores by adding a tannic acid metal chelate compound under spraying a solution of a binder by a centrifugal fluidized granulating machine.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: October 4, 1983
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Toshiba Pharmaceutical Co., Ltd.
    Inventors: Tohru Yui, Hachiro Hirai, Ken Takamaru