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:
Jun. 03, 1980
Filed:
Dec. 01, 1977
Elbert M Idelson, Newton, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
Novel yellow ortho carboxy, ortho' hydroxy azo dyes having a silver halide developing capability and conforming to the formula: ##STR1## where X' is hydrogen, hydroxy, carboxy or any substituent that does not adversely affect the solubility of thecompound of said formula in an aqueous alkaline photographic processing composition and does not render the oxidized form of the compound of said formula mobile in such processing composition; R.sup.5 is hydrogen, hydroxyl, alkyl having from 1-6 carbon atoms or ##STR2## having from 1-6 carbon atoms); R.sup.6 is hydrogen or alkyl; each R.sup.7 is hydrogen or a protective group which can be removed to provide a dihydroxyphenyl silver halide developing substituent and --alkylene-- has from 1-6 carbon atoms.