Zinc oxide powder blends, their production and use
US9949905B2 · kind B2 · utility
0Cited by
4References
24Claims
0Family size
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Key dates
| Filing date | Dec 31, 2015 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Dec 31, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This disclosure provides sunscreen products that contain metal oxide powders having discrete size distributions. Metal oxide powders include, for example, zinc oxide and titanium dioxide. Sunscreen products made in accordance with the principles of this disclosure contain metal oxide powders having primary particle sizes of about 10-30 nm and about 50-200 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.