Sunscreen multilayer particle
US12029801B2 · kind B2 · utility
0Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2020 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Aug 7, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a multilayer UV filter particle, comprising: an odd number of alternating layers of high and low refractive index materials, wherein each layer has a refractive index that differs from that of adjacent layers by at least 0.2, the total number of layers is at least 9, and the particle does not contain a substrate. The particle according to the present invention can have a good UV filtering effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.