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Patent Review

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By: TOM BRANNA

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Composite Powder Patented by Shiseido U.S. Patent No. 7,682,604 B2; Shiseido Co., Ltd., Chuo-ku, Tokyo, Japan, has patented a composite powder that is comprised of a flaky substrate powder, seed particles selected from the group consisting of titanium oxide, zinc oxide, alumina, aluminum hydroxide, silica, iron oxide; and barium sulfate particles or zinc oxide particles. The seed particles act as nuclei on the surface of the flaky substrate powder and the barium sulfate particles or the zin...

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