Patents

Topical Composition with Ascorbic Acid

This Rohto Pharmaceuticals formula contains ascorbic acid, 1,3-propanediol, tocopherol and water.

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By: TOM BRANNA

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US 12,296,038 B2. Yu Kitaoka, Mariko Iwai and Sho Yamashina, all of Osaka, Japan. Assignee: Rohto Pharmaceutical Co. Ltd., Osaka, Japan. Rohto Pharmaceutical researchers patented a topical composition comprising: (A) from 1 to 10% by mass of at least one type selected from the group consisting of ascorbic acid and salts of ascorbic acid; (B) at least 40% by mass of 1,3-propanediol; (C) at least one type selected from the group consisting of tocopherol, salts of tocopherol, and deriva...

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