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:
Mar. 15, 1977
Filed:
Feb. 25, 1974
Applicant:
Inventors:
Claude Marie Brouard, Scotteville les Rouen, FR;
Paulette Gisele Ficht, Mont Saint Aignan, FR;
Assignee:
Produits Chimiques Ugine Kuhlmann, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; D06P / ; D06P / ;
U.S. Cl.
CPC ...
2601 / ; 260150 ;
Abstract
Monoazo chromiferous dyestuffs of the formula: ##STR1## in which A and B each represent a naphthalenic nucleus, one of the residues A and B carrying a sulphonic acid group, Y.sub.1 represents --O-- or ##STR2## Y.sub.2 represents --O-- or ##STR3## and Y.sub.1 and Y.sub.2 are each in a vicinal position with respect to the azo group, D is the residue of a .beta.-diketone bidentate chelating agent and Z represents water, ammonia or pyridine, and process for the preparation of such dyestuffs.