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:
Apr. 25, 1989
Filed:
Jan. 21, 1988
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A monoazo compound represented by the following formula in a free acid form, ##STR1## wherein A is phenylene unsubstituted or substituted with methyl, methoxy, chloro, carboxy or sulfo, or naphthylene unsubstituted or substituted with sulfo, R.sub.1 and R.sub.2 are independently hydrogen, chloro, methyl, nitro, carboxy or sulfo, excepting the case where both R.sub.1 and R.sub.2 are hydrogen, and X is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Y in which Y is a splittable group by the action of an alkali, which is useful for dyeing or printing fiber materials in a deep red color, and an aqueous liquid product of which is stable chemically and physically, even when stored for a long period of time.