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:
May. 12, 1998
Filed:
Mar. 31, 1992
Applicant:
Inventors:
John J Voorhees, Ann Harbor, MI (US);
Charles N Ellis, Ann Harbor, MI (US);
Christopher E Griffiths, Ann Harbor, MI (US);
Assignee:
The Regents of the University of Michigan, Ann Arbor, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
514557 ; 424 59 ; 514725 ;
Abstract
Hyperpigmentation of black skin may be treated by topical application of retinoic acid to the skin. Topical application of retinoic acid is also effective for lightening normal black skin.