Patents by Inventor Takuma Yanagawa

Takuma Yanagawa 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 of manufacturing sulfated cellulose
    Patent number: 4064342
    Abstract: A method of manufacturing sulfated cellulose using any of the Lewis base-SO.sub.3 complexes as a sulfating agent, which characteristically consists in thermally activating cellulose prior to its sulfation in tertiary amines or a mixture of tertiary amines and amine hydrochlorides, thereby enabling alkali metal salts of cellulose sulfate to be favorably accepted as a binder for dentrifice compositions.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: December 20, 1977
    Assignee: Lion Fat and Oil Co., Ltd.
    Inventors: Daini Saika, Takuma Yanagawa, Masaaki Mizuta, Isamu Kadoya