Zinc oxide powder blends, their production and use
US9226880B2 · kind B2 · utility
1Cited by
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8Claims
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Key dates
| Filing date | Feb 24, 2013 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Mar 31, 2033 |
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 ran and about 50-200 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.