Appeal No. 95-0192
Application No. 07/914,228
Appellants have not altered this grouping in their Reply
Brief. Accordingly, we will address only claims 1 and 2, the
broadest claims in each group. See 37 CFR §
1.192(c)(5)(1993); Ex parte Schier, 21 USPQ2d 1016, 1019 (Bd.
Pat. App. & Int. 1991).
As indicated supra, the claimed subject matter is
directed to an intermediate composition comprising a liquid
organic polyisocyanate containing dispersions of a fire
retardant additive and polyurea particles. The polyurea
particles are said to be added to reduce or prevent
sedimentation of the solid fire retardant in the
polyisocyanate, thereby improving the stability and pot-life
of the polyisocyanate.
As evidence of obviousness of the claimed subject matter,
the examiner relies on the combined disclosures of Hughes,
Paige, Gill, Nissen and Hess. As indicated by the examiner,
Hughes describes at column 1, lines 7-15 and column 4, lines
10-23, employing a liquid organic polyisocyanate containing a
dispersion of polyurea particles to produce polyurethanes
having improved physical characteristics. See page 4 of the
4
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