ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,426, issued on Dec. 16, was assigned to Evonik Operations GmbH (Essen, Germany).
"Rhamnolipid oligo-esters" was invented by Xin Lu (Essen, Germany), Jochen Kleinen (Heinsberg, Germany) and Hans Henning Wenk (Muelheim an der Ruhr, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rhamnolipid ester is useful as a cosmetic additive. A method of its production involves providing at least one rhamnolipid, reacting the at least one rhamnolipid with at least one coupling reagent, reacting the at least one rhamnolipid with a polyhydric alcohol having 1 to 32 carbon atoms, and optionally purifying the at least one rhamnolipid ester."
The patent was f...