Appeal No. 2004-1274
Application 09/951,616
enables water or moisture to enter into the wall. See Koenig,
column 1, lines 11-23. Koenig then teaches that prior art wall
boards that are eight feet high by four feet wide have been used
to solve the problem, but the joint between the wall boards
presents the same problem of deterioration of the sealant as well
as the additional problem of difficulty of having the sealant
applied in a way to give the appearance of grout lines between
the wall boards. See Koenig, column 1, lines 24-46. Koenig
solves this problem by providing an extension joint that acts
as a simulated grout line without the necessity of claulking or
grouting between wall boards. See Koenig, column 1, line 47,
through column 2, line 7.
Thus, Koenig recognizes the same problem that Castle recognized
that the deterioration of the sealants between the joints allows
water to enter the wall. Thus, both Castle and Koenig are
attempting to solve the same problem. Castle and Koenig both
recognized the problem of dealing with joint sealants between
moisture barriers (coping elements 26 or wall board panels 40).
Thus, one of ordinary skill in the art would be motivated to use
the Koenig solution in the Castle wall coping system to solve the
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