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:
Aug. 18, 1992
Filed:
Apr. 17, 1989
Applicant:
Inventors:
Douglas Darr, Timberlake, NC (US);
Sheldon R Pinnell, Durham, NC (US);
Assignee:
Duke University, Durham, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
514474 ;
Abstract
Stable topical aqueous compositions are provided containing a concentration of L-ascorbic acid above about 1% (W/V) and maintaining a pH below about 3.5.