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:
Oct. 02, 2012
Filed:
Jun. 20, 2007
Walter Fischer, Reinach, CH;
Abdel-ilah Basbas, Basel, CH;
Martin Brunner, Wallbach, CH;
Rolf Benz, Muttenz, CH;
Walter Fischer, Reinach, CH;
Abdel-Ilah Basbas, Basel, CH;
Martin Brunner, Wallbach, CH;
Rolf Benz, Muttenz, CH;
BASF SE, Ludwigshafen, DE;
Abstract
A reversible thermochromic system comprising a) a compound of the formula (IA) or a tautomer thereof or a compound of the formula (IB) or a tautomer thereof (IA) (IB) wherein Ris C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; Ris hydrogen or a group —SO—R; Rand Rindependently of one another are hydrogen, C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; and R is C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; and b) a compound containing a group of the formula (III).