Photostabilizers, UV absorbers, and methods of...

Details Photostabilizers, UV absorbers, and methods of... Photostabilizers, UV absorbers, and methods of...

2005-07-19

2005-07-19

Tsang, Cecilia J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S019000

Reexamination Certificate

active

06919473

ABSTRACT:
Derivatives of fluorene, including ester derivatives of cyano(9H-fluoren-9-ylidene) acetic acid, and sunscreen compositions including a mixture of a photoactive compound and an ester derivative of cyano(9H-fluoren-9-ylidene) acetic acid are disclosed herein. Also disclosed are methods for terminating a polymer chain with an ester derivative of cyano(9H-fluoren-9-ylidene) acetic acid and methods of filtering out ultra-violet light from a substrate by the use of one or more such derivatives.

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