Patents Represented by Attorney David W. Carstens, Yee & Cahoon, LLP. Carstens
  • Patent number: 5843998
    Abstract: A skin blemish treatment combines a base with therapeutically effective amounts of carbamide peroxide and alpha-hydroxy acid ("AHA"). The resulting formulation effectively treats human acne vulgaris while exhibiting none of the severe adverse side effects associated with benzoyl peroxide. The AHA can be any synthetic or naturally occurring alpha-hydroxy acid. Salicylic acid can augment the composition, as can an anti-inflammatory such as allantoin. Fragrance, coloring agents, and preservatives can also be added.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 1, 1998
    Inventors: Jin Song, John Koch, Marilyn Squier