Appeal No. 1997-3729 6
Application No. 08/362,107
performing formation of silver halide grains while iodide ions are being rapidly generated.
See column 2, lines 21-24.
The range of iodide ions overlaps that of the claimed subject matter and is described
as being preferably from 0.1 to 20 mole percent, more preferably from 0.3 to 15 mole %,
and most preferably from 1 to 10 mole %. See column 9, lines 60-63 and column 13,
lines 1-4. Accordingly, we conclude that the requirement of 0.05 to 1 mole % iodide is
disclosed by Takada. We find that the silver iodide phase of the grain is preferably formed
on the edges of a tabular grain, column 10, lines 8-10, and preferably, “the compositions
of the covering shells, the deposited layers, and the epitaxial portions of a silver halide
containing silver iodide formed by the use of the iodide releasing method of the present
invention have high silver iodide contents.” See column 14, lines 3-7. We find that, “[i]t
is preferable to prepare the outermost shell near the surface of a silver halide grain by using
the iodide ion releasing method of the present invention.” See column 16, lines 53-55.
We conclude therefrom that the iodide ion is present essentially in the outer shells of the
silver halide grain. Our position is further supported by the disclosure that, “[t]he iodide
content of the substrate grain is preferably 0 to 15 mole %, more preferable 0 to 12 mole
%, and most preferably 0 to 10 mole %.” See column 15, lines 11-13. Accordingly, we
further conclude that there is no requirement that any iodide content be present in the
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007