Photographic material comprising a bicyclic pyrazolotriazole...

Details Photographic material comprising a bicyclic pyrazolotriazole... Photographic material comprising a bicyclic pyrazolotriazole...

2005-02-08

2005-02-08

Letscher, Geraldine (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

C430S386000, C430S387000

Reexamination Certificate

active

06852480

ABSTRACT:
Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer a 1H-pyrazolo[1,5-b]-1,2,4-triazole dye forming coupler having a fully substituted carbon atom at the 6-position, a chloro group at the 7-position, and, at the 2-position, a phenyl ring substituted in the meta position with a carbonamido substituent containing an α-sulfone moiety. Photographic elements containing these couplers exhibit desirable bleach-fix and activity characteristics.

REFERENCES:
patent: 5250400 (1993-10-01), Krishnamurthy et al.
patent: 5358829 (1994-10-01), Tang et al.
patent: 5541045 (1996-07-01), Takahashi et al.
patent: 6159671 (2000-12-01), Matsuda
patent: 2001-242606 (2001-09-01), None
Abstract of JP 2001-242606.

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