Interference 103,482
compounds and catalysts, which produce “hemiisotactic olefin
polymers” under all reaction conditions. To be accorded
benefit of its July 15, 1988, Party Ewen must establish that
Ewen et al., U.S. Patent 4,892,851, provides a written
description of any embodiment of the invention of Count 2 in
the manner required by 35 U.S.C. § 112, first paragraph.
Because the arguments presented in Party Ewen’s brief (Ewen
Brief, pp. 46-52) in support of its motion for benefit of the
July 15, 1988, filing date of Application 07/220,007 from
which U.S. Patent 4,892,851 issued, are limited to the prior
application’s purported written description of a syndio-
isoblock polymer having molecular chains in which syndiotactic
and isotactic sequences are present and the sequence length is
3 to 50 monomer units, a polymer we find to be much narrower
in scope than a “hemiisotactic olefin polymer”, we might
properly deny Ewen’s motion without considering whether
Application 07/220,007, from which U.S. Patent 4,892,851
issued, provides a written description of a “hemiisotactic
olefin polymer”. Nevertheless, we shall consider the
alternative question because, in our view, it buttresses our
finding that the syndiotactic polymers described in
Application 07/220,007, from which U.S. Patent 4,892,851
119
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