Appeal No. 1998-3144
Application No. 08/436,688
The present application is a division of U.S. Serial No.
07/971,488, filed 11/4/92. An appeal was taken to this Board
in the parent application (Appeal No. 1995-2202). The present
and prior appeals involve different issues regarding the
subject matter claimed and the prior art applied by the
examiner.
Appellant's now claimed invention is directed to a method
of forming a polyurethane foam that is suitable for a wound-
contacting layer. The polyurethane is formed by mixing one
part by weight of an isocyanate-capped prepolymer and 0.012 to
0.21 parts by weight of a solid rubber latex in addition to
water.
Appealed claims 6, 8, 10 and 12 stand rejected under 35
U.S.C. § 103 as being unpatentable over Wood or Arnason.
Upon careful consideration of the opposing arguments
presented on appeal, we concur with the appellant that the
examiner's rejection is not sustainable.
The examiner appreciates that neither Wood nor Arnason
discloses forming a polyurethane foam by mixing the relative
amounts of isocyanate-prepolymer and solid rubber latex, i.e.,
2
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