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:
Feb. 01, 1977
Filed:
Dec. 06, 1974
Applicant:
Inventor:
Reiner Ditzer, Odenthal-Vois-winkel, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ; D06P / ; D06P / ; D06P / ;
U.S. Cl.
CPC ...
260173 ; 260157 ; 260158 ; 260169 ; 260186 ; 260206 ;
Abstract
Polyazo dyestuffs which in the form of the free acid correspond to the formula ##STR1## wherein R represents an etherified or esterified hydroxyl group in the o- or p-position, D represents the radical of a diazo component which, in the case that the sulpho group in the naphthalene ring is in the 4-position, is free of metallizable groups in the o-position and A can contain further substituents, are useful for the dyeing of hydroxy or nitrogen containing natural or synthetic fiber materials, for example, cellulose fibers in all states of processing, especially cotton and regenerated cellulose, as well as leather and paper.