ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,120, issued on Sept. 9, was assigned to KAO GERMANY GMBH (Darmstadt, Germany).
"Process for permanent waving keratin fibers" was invented by Steven Breakspear (Darmstadt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Compositions and processes disclosed herein permanent wave keratin fibers and/or human hair for achieving durable waves. The keratin fibers and/or human hair are treated with a reducing composition, a non-reducing and non-oxidizing composition comprising tris(hydroxymethyl)aminomethane, optionally a non-reducing and non-oxidizing acidic composition. Subsequently, the keratin fibers and/or human hair are treated with an oxidizi...