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. 09, 1982
Filed:
May. 09, 1980
Fumihiko Yamamoto, Kawasaki, JP;
Mitsuru Katayose, Yokohama, JP;
Kyugo Tanaka, Yokohama, JP;
Teruyuki Misumi, Kawasaki, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A compound of the formula, ##STR1## wherein R is an aromatic compound selected from the group consisting of: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 which may be the same or different, are each selected from the group consisting of hydrogen, chlorine, a C.sub.1-2 alkyl group and a C.sub.1-2 alkoxy group and wherein Y is --SO.sub.2 --, --O--, --S--, --CO--, --N.dbd.N-- or --NHCO--; X is a halogen atom selected from the group consisting of chlorine, bromine, and fluorine; and n is zero or an integer of from 1 to 4. The compound is useful for pigments having hue from the yellow shade to the red shade and having especially high chroma. The pigments also have improved weather resistance, chemical resistance and tinting strength.