Appeal No. 2003-0695 Page 2
Application No. 09/732,014
BACKGROUND
Appellants' invention relates to an article comprising an
isotactic copolymer of propylene and at least one alpha olefin
having 5 or more carbon atoms, the article having a specified
timed delayed compliance ratio property, which is a measure of
relative cold flow resistance. An understanding of the invention
can be derived from a reading of exemplary claim 36, which is
reproduced below.
36. An article having an Rma value of at least about
1.1 comprised of an isotactic copolymer of propylene and at
least one "-olefin having 5 or more carbon atoms;
said at least one "-olefin or "-olefins being present
in the copolymer at a total mole percentage of said at least
one "-olefin or "-olefins in the range of from about 0.2 to
about 6 mole percent based on the total moles of monomer in
the copolymer;
wherein the ratio of the time delayed compliance (TDC)
for an article of a metallocene catalyzed propylene ethylene
copolymer, to the TDC of said article of said isotactic
copolymer, is said Rma and wherein the tensile modulus is
substantially the same for both articles and said TDCs are
measured at 25 ± 2°, after 480 seconds.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Winter et al. (Winter) 5,145,819 Sep. 08, 1992
McAlpin et al. (McAlpin) 5,468,440 Nov. 21, 1995
(filed May 06, 1994)
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