Patents Assigned to Karme Company Ltd.
  • 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