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:
Sep. 07, 1976
Filed:
Oct. 17, 1974
Applicant:
Inventors:
Helmut Seidler, Bonn-Bad Godesberg, DT;
Klaus Wunderlich, Leverkusen, DT;
Hans-Samuel Bien, Burscheid, DT;
Heinrich Leister, Leverkusen, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603261 ;
Abstract
Polycyclic dyestuffs of the formula ##SPC1## Wherein R.sub.1 and R.sub.2 represent alkyl, cycloalkyl, aralkyl or aryl or together form a ring which is optionally interrupted by hetero-atoms and wherein both the benzene nucleus A and the said radicals R.sub.1 and R.sub.2 can carry non-ionic radicals customary in dyestuff chemistry, and their use for the dyeing of organic materials, especially synthetic fiber materials. Dyeings obtained show good general fastness properties.