US Patent Issued to ROHTO PHARMACEUTICAL on May 13 for "Topical composition containing ascorbic acid and/or salt thereof" (Japanese Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,296,038, issued on May 13, was assigned to ROHTO PHARMACEUTICAL Co. LTD. (Osaka, Japan).

"Topical composition containing ascorbic acid and/or salt thereof" was invented by Yu Kitaoka (Osaka, Japan), Mariko Iwai (Osaka, Japan) and Sho Yamashina (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a very stable topical composition. A topical composition is prepared that contains (A) from 1 to 40% by mass of at least one type selected from the group consisting of ascorbic acid and salts of ascorbic acid; (B) at least 20% by mass of a diol having three carbon atoms; (C) at least one type selected from the group consisting of tocopherol, ...