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Shiseido Patents a Composite And Cosmetic Preparation



Published October 31, 2005
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Patent No. US 6,949,248 B2: Tokyo-based Shiseido has patented a metal oxide/silica composite. The metal oxide particles whose primary particle diameter is 1-1000 nm are co-dispersed with silica particles and the metal oxide particles exist substantially as primary particles in the composite.


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