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:
Feb. 21, 1989
Filed:
Oct. 23, 1987
Applicant:
Inventors:
Helen Leong, Atherton, CA (US);
Martin Katz, Menlo Park, CA (US);
Anne Delk, Kensington, CA (US);
David Berliner, Atherton, CA (US);
Sergio Nacht, Los Altos, CA (US);
Assignee:
Advanced Polymer Systems, Redwood City, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ;
U.S. Cl.
CPC ...
424487 ; 424 59 ; 424 48 ; 424486 ;
Abstract
Melanin compositions include a melanin pigment incorporated within an internal pore network defined by a polymeric particle matrix. The melanin compositions may be produced by in situ oxidation of melanin precursors within the pore network, or by absorption of a melanin pigment dispersed in a suitable vehicle or carrier. The melanin compositions are found to display enhanced absorbance of ultraviolet radiation when compared to melanin pigments which are not incorporated in such a polymeric particle matrix.