Ultraviolet light screening compositions
US6869596B1 · kind B1 · utility
15Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1999 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/86
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the particles are adapted to minimise migration to the surface of the particles of the electrons and/or the positively charged holes when said particles are exposed to UV light in an aqueous environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.