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. 30, 2021
Filed:
Nov. 02, 2016
Basf SE, Ludwigshafen am Rhein, DE;
Arend Jouke Kingma, Weisenheim am Sand, DE;
Diana Neumann, Speyer, DE;
Henning Urch, Ludwigshafen, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
Aqueous formulations comprising (A) at least one organic complexing agent selected from (A1) alkali metal salts of aminopolycarboxylic acids and (A2) polymers bearing at least two —CH—N(CHCOOH)-units per molecule, partially or fully neutralized with alkali, (B) at least one salt of at least one of the following acids: nitric acid, sulphuric acid, sulphamic acid, methanesulfonic acid, C-C-carboxylic acids, C-C-hydroxymonocarboxylic acids, C-C-dicarboxylic acids, unsubstituted or substituted with hydroxyl, and C-C-tricarboxylic acids, each unsubstituted or substituted with hydroxyl, (C) at least one compound selected from (C1) phosphoric acid C-C-monoalkyl esters, (C2) a C-C-alkynol, optionally alkoxylated with one to 10 alkoxide groups per hydroxyl group, and (C3) a C-C-alkynediol, optionally alkoxylated with one to 10 alkoxide groups per hydroxyl group, said aqueous formulations having pH values in the range of from 7.5 to 10.