Patents by Inventor Shusaburo Hokkoku

Shusaburo Hokkoku 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).

  • Dextran-alkyl methacrylate graft composition for contact lens and corneas
    Patent number: 3989656
    Abstract: A dextran-alkyl methacrylate graft composition consisting essentially of a dextran unit of the formula (1) ##SPC1##Wherein n is an integer of 5 to 150,000, and a poly(alkyl methacrylate) unit of the formula (2) ##EQU1## WHEREIN M IS AN INTEGER OF 50 TO 200,000 AND R is an alkyl group having 1 to 4 carbon atoms,And a process for producing the same.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: November 2, 1976
    Assignee: Karme Company Ltd.
    Inventors: Sadayoshi Kamiya, Tokihiko Yamamoto, Yasuhiko Onishi, Shusaburo Hokkoku