Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tania Zuberi0
Louis E. Friedrich0
Philip A. Allway0
Stephen P. Singer0
Bernard A. Clark0
Charles E. Heckler0
Date of Patent
November 25, 2008
0Patent Application Number
105746690
Date Filed
October 1, 2004
0Patent Primary Examiner
Patent abstract
The invention provides a color photographic element comprising at least one light-sensitive silver halide emulsion layer or a non silver-containing light-insensitive layer, in which at least one of these layers contains a colorless imidazole compound of formula (I) that undergoes less than 10% chemical or redox reaction with oxidized developer and which enables the photographic speed of the element to be increased by at least 0.05 stop without increasing granularity, compared to the same element without the compound, wherein the compound of formula (I) has the structure:
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