US 12,329,838 B1
Hair dye composition
Shufen Fan, Singapore (SG); Mei Yi Tee, Singapore (SG); and Pei Qi Lim, Singapore (SG)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Oct. 6, 2023, as Appl. No. 18/482,285.
Claims priority of provisional application 63/414,049, filed on Oct. 7, 2022.
Int. Cl. A61Q 5/10 (2006.01); A61K 8/49 (2006.01); A61Q 5/06 (2006.01)
CPC A61K 8/49 (2013.01) [A61Q 5/065 (2013.01); A61K 2800/438 (2013.01); A61K 2800/81 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tunable hair dye composition, comprising:
a) a first photochromic dye activatable by a first activating electromagnetic radiation (EMR) and deactivatable by a first deactivating EMR;
b) a second photochromic dye activatable by a second activating EMR and deactivatable by a second deactivating EMR, wherein the first and second deactivating EMR are different; and
c) a carrier.