Appeal 2007-1905
Reissue Application 10/931,249
Patent 6,444,720 B1
1 Claims on appeal
2 Claim 1 on appeal is representative of the claimed foams.
3 Claim 1 reads:
4 An open-cell rigid foam containing a urethane, isocyanurate or
5 urea group produced by reacting
6 a) a diisocyanate or a polyisocyanate
7 with
8 b) a polyol component comprising a polyoxyalkylene
9 polyol having an average of at least two groups which are
10 reactive with an isocyanate group, has a hydroxyl value
11 of from 3 to 90 and contains no more than 15 mmole.kg-1
12 of carbon-carbon double bonds,
13 c) a blowing agent,
14 and optionally,
15 d) a catalyst, and/or
16 e) auxiliaries and/or additives.
17
18 Normally in assessing the scope of a claim, every limitation in the
19 claim should be given some meaning. However, the italicized portion of
20 claim 1, as reproduced above, adds absolutely nothing to limit the scope of
21 the claim or to define the open-cell rigid foam claimed.
22 Claim 7 covers the method for making the open-cell rigid foam.
23 Claim 10 limits the catalyst used in the method of claim 7 to Bayer's
24 particularly preferred tertiary amine catalyst.
8
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