The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2000
Filed:
May. 12, 1998
Applicant:
Inventors:
John J Voorhees, Ann Arbor, MI (US);
Charles N Ellis, Ann Arbor, MI (US);
Christopher E Griffiths, Manchester, GB;
Assignee:
Regents of the University of Michigan, Ann Arbor, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
514557 ; 514725 ; 424 59 ;
Abstract
Treatment of post-inflammatory hyperpigmentation (PIH) in black and asian skin is accelerated from natural healing by use of a composition comprising a retinoid and/or an inhibitor of cytochrome P-450 enzyme-mediated degradation of retinoids, the composition does not require a conventional depigmenting or bleaching agent (such as a hydroquinone) as is typically used. Healing of PIH lesions is accelerated about three to five times from normal healing. Additionally, these compositions are useful separately for lightening black or asian skin.