Ultraviolet light screening compositions
US8642019B2 · kind B2 · utility
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18References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2005 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Sep 25, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/86
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A UV screening composition comprises particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles. The particles are adapted to minimize migration to the surface of the particles of the electrons and/or the positively charged holes when the particles are exposed to UV light in an aqueous environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.