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:
May. 24, 1977
Filed:
Aug. 03, 1976
Applicant:
Inventors:
Robert Garner, Ramsbottom Bury, EN;
Jean-Claude Petitpierre, Kaiseraugst, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
282 275 ; 2602 / ; 2605 / ; 427150 ; 427151 ; 428323 ; 428411 ; 428914 ;
Abstract
Pressure-sensitive copying or recording material which contains, in its color-producing system, as the color former, at least one azomethine compound of the formula ##STR1## WHEREIN R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent hydrogen, alkyl of 1 to 4 carbon atoms, cyanoalkyl of 2 to 5 carbon atoms, unsubstituted benzyl or phenyl, or benzyl or phenyl substituted by halogen, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, or