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. 25, 1977
Filed:
Aug. 08, 1974
Applicant:
Inventor:
Steven Arnold Dombchik, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260186 ; 260205 ; 260206 ;
Abstract
Yellow to orange, disazo acid dyes which have excellent application and fastness properties on nylon fibers, do not change shade under basic conditions and have the formula ##STR1## wherein SO.sub.3 M is meta or para to the azo group, R.sub.1 is selected from H, CH.sub.3, OCH.sub.3 and Cl, R.sub.2 and R.sub.3 are independently selected from H, CH.sub.3 and OCH.sub.3, R.sub.4 and R.sub.5 are independently selected from H, Cl and CH.sub.3, but only one can be Cl, R.sub.6 is selected from CH.sub.3 and C.sub.2 H.sub.5 and M is, C.sub.1-4 alkylammonium and C.sub.1-2 alkanolammonium cations.