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. 06, 2026
Filed:
Aug. 16, 2022
Applicant:
Northeastern University, Boston, MA (US);
Inventors:
Leila Deravi, Cambridge, MA (US);
Camille A. Martin, Westbury, NY (US);
Amrita Kumar, Cambridge, MA (US);
Assignee:
NORTHEASTERN UNIVERSITY, Boston, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61Q 17/04 (2006.01); A61K 8/02 (2006.01); A61K 8/25 (2006.01); A61K 8/26 (2006.01); A61K 8/29 (2006.01); A61K 8/41 (2006.01); A61K 8/49 (2006.01); A61K 8/73 (2006.01); A61K 8/81 (2006.01); A61K 8/85 (2006.01); A61K 8/86 (2006.01); A61Q 19/08 (2006.01); C09B 19/00 (2006.01); C09B 61/00 (2006.01); C09B 67/02 (2006.01);
U.S. Cl.
CPC ...
A61K 8/29 (2013.01); A61K 8/0245 (2013.01); A61K 8/0275 (2013.01); A61K 8/0283 (2013.01); A61K 8/25 (2013.01); A61K 8/26 (2013.01); A61K 8/411 (2013.01); A61K 8/49 (2013.01); A61K 8/73 (2013.01); A61K 8/8152 (2013.01); A61K 8/85 (2013.01); A61K 8/86 (2013.01); A61Q 17/04 (2013.01); A61Q 19/08 (2013.01); C09B 19/00 (2013.01); C09B 61/00 (2013.01); C09B 67/0097 (2013.01); A61K 2800/412 (2013.01); A61K 2800/438 (2013.01); A61K 2800/45 (2013.01); A61K 2800/52 (2013.01); A61K 2800/651 (2013.01); A61K 2800/654 (2013.01);
Abstract
Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. Each synthetic particle typically includes one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45; the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.