Appeal No. 94-3359
Application 07/941,566
the emulsion layer of the photographic element because the bulk
of the polymeric moiety renders the developer substantially
insoluble in aqueous alkali, a common activator solution for
silver halide emulsions.
Claim 1, the broadest independent claim before us for
our consideration, is considered to be adequately representative
of the appealed subject matter and reads as follows:
1. A black and white photographic element comprising
as a photosensitive medium a layer of a silver halide emulsion
characterised in that the photosensitive medium comprises in the
same layer or in an adjacent layer thereto a developer comprising
a substantially non-diffusing polymeric compound having a
molecular weight of at least 1000 having as a component part of
its structure a plurality of units having a nucleus of general
formula (I):
(I)
wherein;
each Z independently is a member selected from the
group consisting of -OH and a group which leaves an -OH residue
when contacted with an alkali. (pH $10) at temperatures of
#50EC.
The references of record which are being relied on by
the examiner as evidence of lack of novelty and obviousness are:
Schuler 3,186,970 June 1, 1965
Scullard 3,772,014 November 13, 1973
Hofman et al. (Hofman) 3,847,618 November 12, 1974
Henzel et al. (Henzel) 4,927,744 May 22, 1990
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