Appeal 1997-2572
Application 08/220,562
A. Findings of fact
The record supports the following findings by a
preponderance of the evidence.
The claims
1. The claims on appeal are claims 1-22.
2. Claim 1 reads as follows (certain indentation,
matter in bold and matter in brackets added):
A solution consisting essentially of[:]
(I) an organic solvent; [and]
(II) a polyamic acid consisting essentially of the
reaction product of[:]
(A) a dianhydride selected from the group
consisting of[:]
[1] 3,3',4,4'-biphenyltetracarboxylic
dianhydride [BPDA],
[2] bis(3,4-dicarboxyphenyl)ether
dianhydride [ODPA], and
[3] mixtures thereof; and
(B) total diamine in a molar ratio with said
dianhydride of about 1:2 to about 2:1,
where said total diamine consists
essentially of[:]
(1) about 1 to about 30 mole %, based on
total diamine, of a siloxane-
containing diamine and
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