Appeal No. 1998-3320
Application 08/417,017
Baigrie’s other materials for the copper or the silver
material in Tsunaga’s composition, or to add one of these
other materials to Tsunaga’s composition. Consequently, we
reverse the rejection of claim 15.
Rejection of claim 18
Claim 18 requires that a composition containing the
surface modified pigment includes not more than 40 wt% of the
surface modified pigment. Tsunaga teaches that the proportion
of the conductive powder in an electrically conductive
composition “may be chosen from [a] rather broad range in
accordance with the use of the electrically conductive
composition”, and preferably is 100 parts by weight of
electrically conductive powder to 5-50 parts by weight, more
preferably 25 to 40 parts by weight, of the solid content of
the binder resin (col. 4, lines 1-10). Thus, the lowest
amount of electrically conductive powder preferred by Tsunaga
is 100 parts by weight of powder per 50 parts by weight of
solids in the binder resin, i.e., the powder is 67 wt% of the
composition based upon the powder and the solids in the
binder. The appellants’ claim 18, however, encompasses
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