Patents Assigned to Stiefel Laboratories (Ireland) Limited
  • Skin care composition
    Patent number: 6086924
    Abstract: The present invention relates to a method for treating spots and other symptoms of acne and related skins disorders in mammals, which comprises applying to the affected area of the skin of the mammal a non-aqueous composition comprising a dermatologically effective amount of a particulate silica, silica hydrate or precursor thereof. The invention also provides compositions for topical application to the skin which comprise particulate silica, silica hydrate or a precursor thereof in a non-aquous carrier medium.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: July 11, 2000
    Assignee: Stiefel Laboratories (Ireland) Limited
    Inventor: Frank Sheridan
  • Zinc glycerolate manufacture
    Patent number: 5646324
    Abstract: Zinc glycerolate comprised of plate-like crystals is prepared by heating a mixture of zinc oxide, or zinc oxide precursor compound, with glycerol at 15.degree. C. to 105.degree. C., usually at least 45.degree. C. Excess glycerol can be removed from the crude zinc glycerolate product by washing at least once with a C.sub.1 -C.sub.4 alkanol, preferably isopropanol.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: July 8, 1997
    Assignees: Pharmaserve Limited, Stiefel Laboratories (Ireland) Limited
    Inventors: David A. Matkin, Dennis C. Renshaw, Anthony R. Harrison