Appeal 2007-1392
Application 10/640,895
only claims pending in this application. 2 We have jurisdiction pursuant to
35 U.S.C. § 6.
According to Appellant, the invention is directed to a method for
producing polyisocyanurate insulation foams, the method comprising
contacting an isocyanate-reactive compound with an isocyanate compound
in the presence of a blowing agent. The blowing agent comprises isopentane
and n-pentane in the substantial absence of cyclopentane (Br. 2).3 Claim 7
is representative of the invention and is reproduced below:
7. A method for producing polyisocyanurate insulation foams, the
method comprising:
contacting an isocyanate-reactive compound with an isocyanate
compound in the presence of a blowing agent that includes both
isopentane and n-pentane in the substantial absence of cyclopentane,
where the isopentane is present in a weight fraction that is greater than
the weight fraction of the n-pentane.
The Examiner has relied on the following prior art references as
evidence of unpatentability:
Smits US 5,387,618 Feb. 7, 1995
Imperial Chemical PCT WO 97/121764 Jun. 19, 1997
Soukup US 6,140,383 Oct. 31, 2000
2 We refer to the claims as presented in the Revised Appeal Brief.
Appellant’s representative indicated at the oral hearing that the claims
presented in the Reply Brief are in error and have not been presented for
review.
3 We refer to and cite from Appellant’s “Revised Appeal Brief” dated May
22, 2006 and the Reply Brief dated October 16, 2006.
2
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