ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,213, issued on Dec. 30, was assigned to Kao Corp. (Tokyo).
"Aqueous oxidizing composition comprising amino acids" was invented by Jens Heilmann (Darmstadt, Germany) and Peter Bauer (Darmstadt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An aqueous oxidizing compositions comprising one or more amino acids and hydrogen peroxide are described. The aqueous oxidizing compositions reduce hair damage during chemical services. The effect of hair damage reduction was found to be further improved when polycarboxylic acids were added to bleaching powder, oxidative dyeing, and permanent waving compositions."
The patent was filed on Oct. 30, 2020, un...