Silver halide photographic emulsion and silver halide...

Details Silver halide photographic emulsion and silver halide... Silver halide photographic emulsion and silver halide...

2005-04-05

2005-04-05

Letscher, Geraldine (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

C430S569000, C430S502000, C430S503000

Reexamination Certificate

active

06875564

ABSTRACT:
A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains with epitaxial junction meeting the requirements (i) to (v): (i) silver iodochlorobromide grains having (111) faces as main planes and having two parallel twin planes, (ii) an equivalent circle diameter of 3.0 μm or more and an aspect ratio of 8 or more, (iii) each of host tabular grains has six silver halide epitaxial junction portions selectively in apex portions thereof, (iv) at least one of the silver halide epitaxial junction portions has at least one dislocation line, and (v) a spacing between the two parallel twin planes of 0.012 μm or less.

REFERENCES:
patent: 5587280 (1996-12-01), Ikeda et al.
patent: 6100019 (2000-08-01), Brust et al.
patent: 6280920 (2001-08-01), Maruyama et al.
patent: 6544725 (2003-04-01), Morimoto

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