Appeal No. 1997-3609
Application No. 08/483,349
wherein the weight ratio of component b) to component c)
ranges from about 95:5 to about 0:100, and the amounts
of components a), b), and c) are such that the
equivalent ratio of isocyanate groups to isocyanate-
reactive groups is from about 85:100 to about 115:100
and the sum of the urethane
group content plus the urea group content is from
about 1 to about 12%.
The references relied upon by the examiner are:
Mafoti et al. (Mafoti) 5,141,967 Aug. 25,
1992
Dormish et al. (Dormish) 5,204,439 Apr. 20,
1993
Yilgör et al. (Yilgör) 5,389,430 Feb. 14, 1995
The sole issue in this appeal is whether claims 1-13 were
properly rejected under 35 U.S.C. § 103 as being unpatentable
over Dormish in view of Mafoti and Yilgör.1
Discussion
Claim 1 is directed to an improved method of producing a
coated substrate wherein the improvement lies in the contact
adhesive used. Specifically, the contact adhesive is a
polyurethane/urea composition "consisting essentially of" a
polyisocyanate or polyisocyanate adduct, a polyol blend and at
1The examiner relies on the teachings of Mafoti and/or
Yilgör in combination with Dormish to reject one or more of
dependent claims 2-13. See Answer, p. 3.
3
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