Particulate metal oxide
US7503970B2 · kind B2 · utility
5Cited by
18References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2007 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A particulate metal oxide having the mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.