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:
Dec. 26, 1978
Filed:
Dec. 21, 1976
Gunther Fischer, Leipzig, DE;
Beate Wenzel, Dessau-Sud, DE;
Steffen Scheithauer, Dessau, DE;
Udo Franz, Dresden, DE;
Karl-Wilhelm Junge, Dessau, DE;
Christof Schroter, Leipzig, DE;
Siegfried Gahler, Wolfen, DE;
Johannes Morgenstern, Pirna-Copitz, DE;
VEB Filmfabrik Wolfen, Wolfen, DE;
Abstract
A process for the stabilization of and the prevention or substantial reduction of fogging in the use of photographic silver halide emulsions, characterized in that compounds selected from the group consisting of those represented by the general formulas I, II, and III: ##STR1## are added to the emulsion, before or during chemical sensitization and before coating of the emulsions onto a support therefor, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as herein described.