Patents Examined by P. Spivack
  • Pharmaceutical or cosmetic composition containing a combination of a retinoid and a sterol
    Patent number: 5556844
    Abstract: A pharmaceutical or cosmetic composition comprising in combination, a retinoid and a sterol inhibits the biosynthesis of cholesterol, is disclosed wherein a synergistic effect, principally in the treatment of disorders of epidermic keratinization, disorders of epidermic or epithelial proliferation and/or disorders of sebaceous function, is exhibited.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: September 17, 1996
    Assignee: Centre International De Recherches Dermatologiques Galderma (Cird Galderma)
    Inventors: Uwe Reichert, Rainer Schmidt, Braham Shroot
  • Ammonium aryl hydrazide compounds
    Patent number: 5130480
    Abstract: Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively low pH values and have low fog and low tendency to form black spots in unexposed or slightly exposed areas.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: July 14, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Reinhold Ruger