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. 02, 1979
Filed:
Jan. 15, 1975
Robert J Pollet, Vremde, BE;
Robrecht J Thiers, Brasschaat, BE;
Theofiel H Ghys, Kontich, BE;
Antoon L Vandenberghe, Hove, BE;
Herman A Philippaerts, Edegem, BE;
Hubert Vandenabeele, Mortsel, BE;
AGFA-GEVAERT N.V., Mortsel, BE;
Abstract
A method for producing photographic images by development of an exposed silver halide element at elevated temperature is provided wherein the development occurs in the presence of a non-quaternary, non-heterocyclic nitrobenzene compound of the formula: ##STR1## WHEREIN: (R).sub.n stands for one or more substituents selected from hydrogen, halogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, alkylmercapto, substituted alkylmercapto, amino, substituted amino, aryl, substituted aryl, hydroxy, nitro, cyano, sulpho or carboxy in acid or salt form, alkoxycarbonyl and an acyl group derived from a carboxylic or sulphonic acid. The nitrobenzene compounds have a favorable effect on the sensitometric properties of the silver halide emulsion that are developed at elevated temperature. They reduce the supplemental fog produced by development at elevated temperature.