Appeal No. 96-3202
Application No. 08/183,464
to increase porosity and thereby the reception of the
coating. Rao discloses that BN will break down as a5
structural solid at about 750°F. and MoS will do so at about
2
600°F. Rao further teaches that to permit such substances to
continue providing antifriction characteristics after such
breakdown, the supporting surface may be provided with
reservoirs 43 or grooves to capture or retain the solid film
lubricant coating 44, much in the manner of porosity.6
Tanaka discloses a sliding bearing material with an outer
porous metal layer having a composition impregnated into the
pores thereof. The composition can contain from 0.5 to 30% by
volume a solid lubricant such as graphite.7
After the scope and content of the prior art are
determined, the differences between the prior art and the
5See column 6, lines 10-28, of Rao.
6See column 6, lines 48-57, of Rao.
7See page 5, line 14 , to page 6, line 6, of Tanaka.
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