Appeal No. 95-3782
Application 08/048,371
is known in the industry to add light stabilizers, heat
stabilizers, and antioxidants to stabilize these organic
polymers (column 1, lines 25-30). Appellants state that the
polyorganosiloxane of Foster stabilizes olefin polymers
against “light and heat” (brief, page 2, citing Foster, column
1, lines 59-64). However, as noted by the examiner on page 4,
line 1, of the answer, Foster also teaches that his disclosed
polysiloxanes “are herein used as additives in olefin polymers
either as antioxidants and/or heat stabilizers and/or light
stabilizers.” (column 7, lines 61-65). Eager specifically
calls for an antioxidant in his preferred filling material
composition (column 4, lines 9-13). Thus we agree with the
examiner that it would have been well within the ordinary
skill in the art to use the polysiloxane of Foster in the
grease filled cable composition of Eager for its known
antioxidant properties with olefin compositions. Appellants
only address the reasons why one of ordinary skill in the art
would not be interested in the polysiloxane of Foster for its
light and heat stabilizing effects when used in the grease
filled cable composition of Eager.
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