The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2026
Filed:
Jun. 04, 2021
Chemetall Gmbh, Frankfurt am Main, DE;
Anna Verena Mohr, Frankfurt am Main, DE;
Marcell Six, Frankfurt am Main, DE;
Nawel Souad Khelfallah, Frankfurt am Main, DE;
CHEMETALL GMBH, Frankfurt am Main, DE;
Abstract
Disclosed herein is an aqueous composition having a pH value at 55° C. in the range from 5 to 9, containing at least one different amino organophosphonic acid derivatives of formula (I) where residues R independently of each other are CH—PO(OR″), residues R' independently of each other are alkylene residues with 2 to 4 carbon atoms, residues R″ independently of each other are H, Na, K, Li or NH; and n is an integer from 0 to 4; and at least one copolymer, which is water-soluble or water-dispersible. Further disclosed herein are a concentrate to produce such compositions, a pickling method for pickling metallic substrates making use of the compositions, a coating method for coating metallic substrates including the pickling method and a method of using the compositions for pickling metallic substrates.