Compositions – Light transmission modifying compositions – Ultraviolet
Reexamination Certificate
2009-07-31
2011-12-06
Choi, Ling (Department: 1761)
Compositions
Light transmission modifying compositions
Ultraviolet
C424S059000, C424S060000, C424S401000, C424S094100, C514S337000, C514S532000, C514S557000, C514S569000, C514S703000, C524S090000, C558S410000, C546S280100, C560S061000, C562S471000, C562S490000, C562S510000, C568S446000, C568S823000
Reexamination Certificate
active
08070989
ABSTRACT:
The photostabilizing electronic excited state energy—particularly singlet state energy from retinoid compounds—has been found to be readily transferred to (accepted by) α-cyanodiphenylacrylate compounds having an alkoxy radical in the four (para) position (hereinafter “alkoxycrylenes”) on one of the phenyl rings having the formula (I):wherein one of R1and R2is a straight or branched chain C1-C30alkoxy radical, preferably C1-C8, more preferably methoxy, and the non-alkoxy radical R1or R2is hydrogen; and R3is a straight or branched chain C1-C30alkyl radical, preferably C2-C20. The alkoxycrylene compounds of formula (I) significantly increase the photostability of retinoid compounds in a composition by at least 3-fold and as much as 10-fold or greater. The ability of the alkoxycrylene compounds to stabilize the retinoid compound is concentration dependent, with the amount of retinoid photostabilization increasing with the concentration of the alkoxycrylene compound.
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Bonda Craig A.
Pavlovic Anna
Zhang Jean
Ahvazi Bijan
Choi Ling
Hallstar Innovations Corp.
Marshall & Gerstein & Borun LLP
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