Patents Examined by Wille J. Thompson
  • Pigment system for paper
    Patent number: 4752341
    Abstract: Zeolite of a small controlled particle size has been found to be a pigment component to be used with TiO.sub.2 in papermaking. Zeolite A wherein the sodium has been at least partially replaced with calcium and/or hydronium ion is widely useful with TiO.sub.2 in papermaking.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: June 21, 1988
    Assignee: PQ Corporation
    Inventor: Steven L. Rock