Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
2008-04-08
2008-04-08
Visconti, Geraldina (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S503000, C430S504000, C430S505000, C430S506000, C430S567000, C430S600000, C430S611000, C430S613000
Reexamination Certificate
active
10574394
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 heterocyclic compound having either one or two hetero atoms in the ring or ring system, being other than an imidazole compound, that undergoes less than 10% chemical or redox reaction directly with oxidized developer and which has a partition coefficient to enable the photographic speed of the element to be increased by at least 0.03 stop without increasing granularity, compared to the same element without the compound. The heterocyclic compounds increase speed without a concomitant increase in size of the light-sensitive silver halide grains.
REFERENCES:
patent: 6319660 (2001-11-01), Allway et al.
patent: 7074550 (2006-07-01), Miki
patent: 7115356 (2006-10-01), Toyoda et al.
patent: 1 072 952 (2001-01-01), None
patent: 1 016 912 (2003-08-01), None
Allway Philip A.
Clark Bernard A.
Friedrich Louis E.
Heckler Charles E.
Singer Stephen P.
Eastman Kodak Company
Kluegel Arthur E.
Visconti Geraldina
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