Appeal No. 95-3782
Application 08/048,371
The examiner applies Foster for the disclosure of a
polysiloxane having pendent, sterically-hindered heterocyclic
moieties attached to the siloxane chain (answer, page 3). The
examiner states that the basic structure of the siloxane
monomer in appealed claim 2 is disclosed by Foster in claim 1
(id.). The examiner further finds that Foster teaches this
siloxane is used as an antioxidant and is added to polyolefins
to stabilize them against light, heat or other forms of
degradation (answer, page 4). The examiner concludes that it
would have been obvious to use Foster’s polysiloxane with
Eager’s polyethylene cable composition in order to stabilize
the polyethylene in the presence of heat, light or other forms
of degradation (id.).
Appellants do not contest that Foster discloses the same
polysiloxane additive as required by the appealed claims
(brief, page 2). However, appellants argue that a person of
ordinary skill in the art would not be led to the Foster
reference for several reasons (brief, page 4). Appellants
submit that the artisan who wishes to stabilize a grease
filled cable would not be interested in the Foster
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