Method of photostabilizing UV absorbers, particularly dibenzyolmethane derivatives, e.g., Avobenzone, with cyano-containing fused tricyclic compounds
US9125829B2 · kind B2 · utility
22Cited by
177References
56Claims
0Family size
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Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Feb 24, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A photostabilized photoactive composition comprising a mixture of a photoactive compound that develops a singlet excited state, or fluoresces when subjected to UV radiation and an effective amount of an excited state quencher comprising a cyano-containing fused tricyclic compound of formula (I):
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.