Patents Assigned to Sadayoshi Kamiya
  • Pullulan copolymer
    Patent number: 4618664
    Abstract: A pullulan copolymer obtained by reacting with a polymerizable olefinic compound a pullulan ester which is produced by reacting pullulan with an unsaturated acid to introduce a double bond of carbon thereinto. It is highly hydrophilic and is a material having a high affinity for a living body and which is, therefore, useful for making contact lenses, intraocular lenses, artificial bones and blood vessels, etc.
    Type: Grant
    Filed: January 9, 1985
    Date of Patent: October 21, 1986
    Assignee: Sadayoshi Kamiya
    Inventor: Yasuhiko Ohnishi