Patents Assigned to BSG, Inc.
  • Photochromic emulsion
    Patent number: 5073303
    Abstract: A photochromic material adapted for coating light transmissive materials. The photochromic material contains photosensitive silver halide crystals having dimensions in the range of approximately 50 Angstroms to 800 Angstroms. The silver halide crystals are surface doped with copper ions and another sensitizer selected from mild reducing agents or sulfur-bearing ions. The crystals are dispersed in a protective polymer that does not irreversibly bind halogen.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: December 17, 1991
    Assignee: BSG, Inc.
    Inventor: Jerome L. Reid