Patents Assigned to Polymer Technology, Corp.
  • Dimensionally stable oxygen permeable hard contact lens material and method of manufacture
    Patent number: 4826889
    Abstract: Improved contact lens materials are obtained from copolymers containing a siloxanyl alkyl ester vinyl monomer by exposing the materials to high energy radiation thereby reducing the amount of unreacted monomer and residual contaminants.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: May 2, 1989
    Assignee: Polymer Technology, Corp.
    Inventors: Edward J. Ellis, Louis Mager