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:
Apr. 12, 2022
Filed:
Aug. 10, 2018
Archroma Ip Gmbh, Reinach, CH;
Erwin Lucic, Singapore, SG;
Jorg Hubner, Heidelberg, DE;
David Hyett, Sittard, NL;
Michele Catherine Christianne Janssen, Eindhoven, NL;
Karin Hendrika Maria Bessembinder, Eindhoven, NL;
Pierre L. Woestenborghs, Dilsen-Stokkem, BE;
Marinus Petrus Wilhelmus Maria Rijkers, Elsloo, NL;
Archroma IP GmbH, Reinach, CH;
Abstract
Stable aqueous leucoindigo solution comprising an aromatic amine in the form of aniline or aniline and N-methylaniline, wherein said leucoindigo is in the form of an alkali metal salt; wherein the concentration of the aromatic amine is below 40 ppm determined according to ISO 14362-1:2017(E); and wherein the concentration of the leucoindigo salt is in a concentration range of from 10 to 45% by weight based on the total weight of the solution, and wherein the stability of the solution is measured at a temperature of 23° C.; or wherein the concentration of the leucoindigo salt is in a concentration range of from 45 to 65% by weight based on the total weight of the solution, and wherein the stability of the solution is measured at a temperature of 60° C.