Patents by Inventor Constant Wippler

Constant Wippler 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).

  • New photochromic materials and method for their preparation
    Patent number: 4116862
    Abstract: A photochromic material comprising a transparent polymer material having a block copolymer base with a structure wherein blocks of a first polymer form a dispersed phase in a matrix phase essentially composed of blocks of a second polymer, and an organic photochromic substance uniformly distributed in said polymer material.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: September 26, 1978
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventor: Constant Wippler