Patents Assigned to Interoptic Laboratories, Inc.
  • Abrasive pad for grinding lenses
    Patent number: 3959935
    Abstract: A pad for grinding lens blanks comprising a pliable sheet of a water-proof material (e.g., paper or fabric) with an adhesive coating on one side thereof for adhering onto a working surface. An abrasive substance (e.g., silicon carbide) is applied to the pad and a plurality of radially extending channels are cut through its area to provide a smooth fit over a working surface.
    Type: Grant
    Filed: March 18, 1975
    Date of Patent: June 1, 1976
    Assignee: Interoptic Laboratories, Inc.
    Inventor: Waldemar Stoppacher