Appeal No. 1998-2203
Application 08/428,497
address only claim 15, which is the broadest independent
claim.
Rejection over Vaughan in view of FR ‘004 and
either Sander ‘640 or Sander ‘058
Vaughan discloses a process for producing polyimide
shaped articles such as films and fibers by chemically or
thermally treating poly(amic acid) shaped articles (page 1,
lines 10-21; page 6, line 100 - page 7, line 4; page 13,
lines 5-23). Vaughan’s poly(amic acid) is made by
“condensation of a dianhydride of aromatic character and a
diprimary amine of aromatic character in an organic liquid
medium in which the reactants are sufficiently soluble to
undergo polymerization in the liquid phase, but which is per
se a non-solvent for the poly(amic acid) and is miscible with
minor amounts of water, and in which medium a minor amount of
water is present at least during the latter part of the
reaction” (page 2, lines 27-38). Vaughan’s poly(amic acid)
can have the structure shown in formula 2 of the appellants’
claim 15 (page 4, lines 48-89). Vaughan’s organic liquid
media include ketones and ethers (page 2, lines 69-88), which
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