Sunscreen agents
US5474762A · kind A · utility
9Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Aug 16, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/56
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A sunscreen composition for application to human skin comprises an ultraviolet absorber which is introduced as an anion into a layered double hydroxide of the general formula EQU [N.sub.m N.sub.n (OH).sub.2(m+n) ].sup.y+ X.sup.x-.sub.y/x .multidot.zH.sub.2 O where M is a divalent metal or lithium, N is a trivalent metal and X denotes anions present as an interlayer between layers of metal atoms joined through the OH groups. Such layered double hydroxides are, for this invention, suspended in a cosmetically acceptable vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.