Zinc oxide powder blends, their production and use
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United States of America Patent
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Feb 26, 2013
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app pub date -
Oct 23, 2006
filing date -
Oct 21, 2005
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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.
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