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:
Aug. 09, 2022
Filed:
Dec. 19, 2019
Applicant:
Papierfabrik August Koehler SE, Oberkirch, DE;
Inventors:
Michael Horn, Offenburg, DE;
Timo Stalling, Appenweier, DE;
Assignee:
PAPIERFABRIK AUGUST KOEHLER SE, Oberkirch, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 9/02 (2006.01); C07C 317/42 (2006.01); B41M 5/327 (2006.01); B41M 5/333 (2006.01);
U.S. Cl.
CPC ...
C09K 9/02 (2013.01); B41M 5/3275 (2013.01); B41M 5/3333 (2013.01); C07C 317/42 (2013.01); C09K 2211/1007 (2013.01);
Abstract
Described are colour developers of formula (I) Ar—SO—NH—CH—SO—CH—NH—CO—NH—Ar(I), a heat-sensitive recording material, comprising a carrier substrate and also a heat-sensitive, colour-forming layer comprising at least one colour former and at least one phenol-free colour developer, the at least one colour developer being the compound of formula (I), and a method for producing this heat-sensitive recording material.