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:
Jan. 10, 1975
Applicant:
Inventors:
Gioacchino Boffa, Novara, IT;
Nicola Mazzaferro, Novara, IT;
Assignee:
Montedison S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260272 ; 260 4221 ; 260278 ;
Abstract
A new class of heterocyclic compounds containing N and S in the basic skeleton and which are 5-aza-7-thiadibenzocrysene derivatives useful as dyes or as intermediates in the synthesis of dyes and pigments are disclosed, as well as a method of obtaining the same by reaction of o-aminothiophenol 2-hydroxy-1-azabenzanthrone or its derivatives.