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. 02, 1978
Filed:
Jun. 29, 1976
Applicant:
Inventors:
Manfred Greve, Allschwil, CH;
Helmut Moser, Reinach, CH;
Assignee:
Sandoz Ltd., Basle, CH;
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ;
U.S. Cl.
CPC ...
8 41 / ; 8-7 ; 8 41 / ; 8 41 / ; 8 41 / ; 8168 / ; 8168 / ; 8168 / ; 8168 / ; 8177 / ; 8178 / ; 8178 / ; 260156 ; 260169 ; 260174 ;
Abstract
Disclosed are disazo and trisazo dyes free of sulfo groups which contain two 6-hydroxy-4-methyl-3-N-pyridiniumpyridone-2 coupling component radicals, preferably dyes of the formula ##STR1## wherein R is a tetrazo component radical,