Appeal No. 1997-3282
Application No. 08/189,314
Instead, Shibano focuses on the properties of shearing modulus
and wettability of suitable polyolefin polymers and further
emphasizes the critical ranges of these properties necessary
in carrying out the invention. Shibano discusses the use of
additives including cross-linkers and the combining of several
polymers to create ethylene-alpha olefin copolymers having a
density of 0.80 to 0.90 g/cm , which clearly teaches away from3
using homogeneous ethylene/alpha-olefins. Our understanding,
based on our evaluation of the Shibano patent, is that a
person of ordinary skill in the art at the time the invention
was made would have understood Shibano to teach or make
obvious polyolefin polymers having a relatively wide variety
of chain lengths and comonomer percentages resulting in a
relatively wide variation in molecular weight and composition
distributions.
We agree with the appellant to the extent that the
"[e]xaminer has not cited any references which taught or
4(...continued)
No. 3,931,356, col. 3, lines 37-40; col. 6, lines 56-62. A
copy of Dalton is attached to this decision.
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