ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,850, issued on Feb. 18, was assigned to HSO Herbert Schmidt GmbH & Co. KG (Solingen, Germany).
"Pickle for polyamide" was invented by Almedina Fetahovic (Solingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Process for pickling polyamide, comprising the steps a) contacting the polyamide with a pickling solution comprising a mixture of at least two inorganic acids MHF2, where M is an alkali ion or an ammonium ion a monocarboxylic acid with 1 to 5 carbon atoms b) contacting with an organic solvent having 1 to 10 carbon atoms, wherein steps a) and b) take place consecutively or simultaneously."
The patent was filed on March 28, 2022, under...