Appeal No. 2006-0494 Παγε 5
Application No. 10/285,801
can include greater than or equal than 60 phr of a natural rubber
or synthetic polyisoprene and filler materials. One or more
rubbers are disclosed as being useful in the rubber composition
of Masson, such as a blend of polybutadiene and natural rubber.
See column 2, line 53 through column 3, line 19 of Mason. Masson
also makes it abundantly clear that stiffness and reduced mass
are desired properties of the support element and rubber
composition from which it is made. See, e.g., column 10, lines
25-42 and column 6, lines 54-57 of Masson.
Concerning the representative claim 1 requirements for nylon
and a rubber having nylon side chains grafted thereto as being
component parts of the rubber composition used in a tread
support, the examiner acknowledges that Masson does not disclose
grafting nylon onto the diene elastomer component thereof. Thus,
the examiner turns to Pyke. In this regard, Pyke discloses that
the grafting of nylon chains to rubber results in formulating
rubbers wherein increased stiffness (and modulus) properties are
obtained, which may be useful in applications where such
properties are desirable. Pike (column 1, lines 5-43) suggests
that the use of that grafting technique can reduce the need for
large amounts of fillers, which are employed to increase
stiffness.
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