Appeal 2007-4189
Application 10/164,986
material integrally with or inserted into the lower ring 56 are
frequently subjected to breakage during the cleaning procedure.
When one or more of the locating pins 60 break off from the
lower ring 56, the lower ring can no longer engage the upper
ring 54 and must be scrapped. Broken locating pins 60
therefore leads to the complete replacement of the composite
shadow ring 50.
(Specification 9-10).
Tolles discloses a chemical mechanical polishing system using dowel
pins to abut two surfaces together. Tolles does not describe composite
shadow rings or the material from which the dowels are made.
Flach is directed to concentric finger joints for end joining two
segments of timber (Flach, col. 1, ll. 16-18). Flach discloses that fiber
reinforced plastic dowels can be used to join aligned cavities (Flach, col. 1,
ll. 43-45; col. 6, ll. 49-52).
Clark is directed to the field of precast concrete insulated sandwich
panels (Clark, col. 1, ll. 10-15). Clark discloses that fiber reinforced plastic
dowels can be used to replace steel (Clark, col. 1, ll. 56-63).
Harvey is directed to a modular tower tooling system that comprises
two or more bases that have been joined together (Harvey, col. 1, ll. 4-10).
Harvey discloses dual diameter dowels (See Fig. 6).
The Federal Circuit has delineated two criteria for indicating whether
prior art references are analogous: (1) whether the art is from the same field
of endeavor, regardless of the problem addressed, and (2) if the art is not
within the same field endeavor, whether it is reasonably pertinent to the
particular problem to be solved. In re Clay, 966 F.2d 656, 658-59,
23 USPQ2d 1058, 1060 (Fed. Cir. 1992); In re Deminski, 796 F.2d 436, 442,
230 USPQ 313, 315 (Fed. Cir. 1986); In re Wood, 599 F.2d 1032, 1036,
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