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:
Jan. 31, 1995
Filed:
Dec. 10, 1993
Applicant:
Inventors:
Gunther Beck, Leverkusen, DE;
Bernd Kaletta, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558343 ;
Abstract
1,2,3-Tricyanobenzene can be prepared in a good yield from fluorobenzonitriles by reaction with an alkali metal cyanide. This product can be converted into metal-free tetracyanophthalocyanines or into the corresponding metal complexes by tetramerisation, if appropriate in the presence of metals or metal compounds. These products are excellent organic pigments.