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:
Jul. 12, 2022
Filed:
Aug. 10, 2018
Applicant:
Archroma Ip Gmbh, Reinach, CH;
Inventors:
Erwin Lucic, Singapore, SG;
Jorg Hubner, Heidelberg, DE;
Assignee:
Archroma IP GmbH, Reinach, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 7/00 (2006.01); C09B 7/02 (2006.01); C09B 67/54 (2006.01); D06P 1/22 (2006.01); C09B 67/44 (2006.01); B01D 3/14 (2006.01);
U.S. Cl.
CPC ...
C09B 7/02 (2013.01); C09B 67/0083 (2013.01); C09B 67/0096 (2013.01); D06P 1/228 (2013.01); B01D 3/14 (2013.01);
Abstract
Aqueous leucoindigo solution comprising an aromatic amine, in particular aniline or aniline and N-methylaniline, wherein the concentration of the aromatic amine is below 200 ppm, wherein the leucoindigo salt in the solution is in the form of a mixed sodium and potassium salt, wherein the molar ratio of sodium to potassium is in the range of from above 3:1 to 10:1, preferably wherein the concentration of the salt is in the range of from above 25 to 45% by weight, based on the total weight of the solution.