Appeal No. 2001-0729
Application No. 09/013,091
Claim 1 is representative of the subject matter on appeal
and is reproduced below:
1. A method of forming a sensitized silver chloride
emulsion comprising forming a silver chloride emulsion,
adding spectral sensitizing dye, sulfur, and gold
sulfide to said emulsion, heating said emulsion to
chemically and spectrally sensitize said emulsion, and
cooling said emulsion, wherein said sulfur is present
in an amount between 0.05 and 20 mg/silver mole, said
gold sulfide is present in an amount between 1 and 60
mg/mol Ag, said sulfur comprises sodium thiosulfate and
is present in an amount between 0.1 and 1.0 mg/silver
mol, and wherein said silver chloride emulsion has
grains that comprise greater than 95 percent chloride
and are cubic.
The references relied upon by the examiner are:
Asami 5,434,034 Jul. 18, 1995
Ohzeki 5,891,614 Apr. 06, 1999
(filed Apr. 18, 1997)
Ground of Rejection
Claims 1, 4, 5 and 8-13 stand rejected under 35 U.S.C. § 103
as unpatentable over Asami in view of Ohzeki.
We reverse.
Background
The invention relates to a method of forming a sensitized
silver chloride emulsion of the type used in photographic
2
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