Appeal No. 1997-1997
Application No. 08/263,496
Carroll et al. (Carroll) 4,261,852 Apr. 14, 1981
Watts et al. (Watts) 5,070,114 Dec. 03, 1991
Appellant's claimed invention is directed to a liquid
polyisocyanate prepolymer that is the reaction product of an
organic polyisocyanate blend and a polyoxypropylene polyether
polyol. The polyisocyanate blend comprises a diphenylmethane
diisocyanate and a polymethylene polyphenyl polyisocyanate.
The prepolymer of the present invention has an overall NCO
content of from 22 to 31 weight percent. According to
appellant's specification, the claimed prepolymer is used in
the manufacture of polyurethane foams.
Appealed claims 1-3, 5-7 and 18-22 stand rejected under
35 U.S.C. § 102(b) as being anticipated by Carroll. Claims 8-
17 stand rejected under 35 U.S.C. § 103 as being unpatentable
over Watts. In addition, claim 4 stands rejected under
35 U.S.C. § 103 as being unpatentable over Carroll in view of
Watts.
Upon careful consideration of the opposing arguments
presented on appeal, we agree with appellant that the
examiner's rejections are not sustainable.
We consider first the examiner's rejection of claims 1-3,
-3-
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