Appeal No. 1998-0870
Application No. 08/325,015
suitable in Kinoshita’s antistatic coating, thus making them
interchangeable for the purposes disclosed in Kinoshita. In
re Corkill, 771 F.2d 1496, 1500, 226 USPQ 1005, 1008 (Fed.
Cir. 1985); In re Longi, 759 F.2d 887, 896, 225 USPQ 645, 651
(Fed. Cir. 1985); In re Fout, 675 F.2d 297, 301, 213 USPQ 532,
536 (CCPA 1982).
As to the steric stabilizer for the polypyrrole, we
conclude that it would also have been obvious to one of
ordinary skill in the art to use an appropriate amount of
steric stabilizer for the polypyrrole in Kinoshita, because
Kinoshita suggests the use of a dispersant (i.e., a surfactant
or a steric stabilizer) for the black electrically conductive
fine powder particles and its incorporation would be expected
to prevent precipitation from the aqueous dispersion (i.e.,
maintain a stable dispersion) as suggested by Armes.
Appellants urge that the coating of the present invention
provides the advantages of not requiring the use of harmful
organic solvents, of not requiring a time-consuming
centrifuging step in its preparation, and not being subjected
to being washed away when a layer of alcoholic solution of an
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