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:
Nov. 07, 1989
Filed:
Dec. 15, 1987
Applicant:
Inventors:
Joan T Vermeersch, Deinze, BE;
Daniel Timmerman, Mortsel, BE;
Hubert Vandenabeele, Mortsel, BE;
Jacques L Vervecken, Berchem, BE;
Assignee:
AGFA-GEVAERT, N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430623 ; 430621 ; 430627 ; 430639 ; 430640 ;
Abstract
The present invention provides a method of hardening a proteinaceous layer of a photographic silver halide element by incorporating a modified dextran in said proteinaceous layer, said modified dextran being the reaction product of dextran and an alkyl haloformate, a substituted alkyl haloformate, an aryl haloformate, or a substituted aryl haloformate. The invention also provides a photographic element comprising a said reaction product in at least one proteinaceous silver halide emulsion layer and/or in another proteinaceous layer coated thereon.