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. 10, 1981
Filed:
Mar. 27, 1979
Applicant:
Inventor:
David A Brode, Birdsboro, PA (US);
Assignee:
Crompton & Knowles Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09H / ;
U.S. Cl.
CPC ...
260173 ; 260169 ;
Abstract
This invention relates to a new group of trisazo compounds that are useful as direct dyes for cellulosic textiles, paper and leather; imparting a black coloration thereto. The new dye is intended to replace the widely used paper dye known as C.I. Direct Black 38--a dye synthesized from an intermediate (benzidine) whose use is being curtailed because it is a known carcinogen.