Interference No. 103,303
Crystalline copolymers of5 A syndiotactic propylene
propylene and 1-butene with an copolymer comprising propylene
essentially syndiotactic and butene
structure
1.3 to 10 mole% of 1-butene 1 to 24 mole % of butene
melting point from 110E to --------
140EC
a fraction soluble in xylene --------
less than 10% by weight
composition similar to the ----------
mixture of the monomers present
in the gas phase during the
preparation of said monomers
------- wherein in the C-NMR 13
spectrum of said syndiotactic
propylene copolymer,
said copolymer exhibits a
ratio of the intensity of a
peak at about 20.2 ppm to the
sum of the intensities of
the total peaks attributable
to methyl groups in propylene
units at about
19-22 of 0.5 or more.
Assuming that the copolymer of Asanuma et al.'s claim 11
is prior art to Galimberti et al.'s claim 1, we agree with the
APJ in charge of this interference that the party Galimberti
5According to paragraph 6 of the declaration of Dr.
Maurizio Galimberti (GX 1), "the measure of xylene solubles is
a rough evaluation of the cristallinity [SIC] of the polymer
[propylene/1-butene]. The lower is the xylene soluble
fraction, the higher is the cristalline [SIC] degree of the
polymer."
-12-
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