Appeal No. 2001-0080
Application No. 08/577,217
The subject matter on appeal relates to a pneumatic tire
comprising the recited tread and the recited conductive thin
film. Further details of this appealed subject matter are
recited in illustrative claim 1, the sole independent claim on
appeal, reproduced below:
1. A pneumatic tire comprising a tread and a
conductive thin film provided on the surface of said
tread continuously in the circumferential direction of
the tire,
wherein said conductive thin film is made from a
rubber composition comprising a rubber and at least 10
parts by weight of carbon black per 100 parts by
weight of said rubber, said carbon black has an
average particle size of at most 40 nm and a DBP oil
absorption of at least 150 ml/100 g, and said
conductive thin film has a thickness of 0.1 to 0.5 mm
and a volume resistivity of not more than 105 Ω·cm, and
said conductive thin film is provided on at least both
edge portions of said tread, and the width in the
direction from one edge toward the center of said
tread of said conductive thin film located on one side
of the tread is from 10 to 50% of the full width of
said tread; and
said tread is made from a rubber composition
comprising a diene rubber and 40 to 100 parts by
weight of silica having a BET specific surface area of
100 to 300 m2/g per 100 parts by weight of said diene
rubber, the content of said silica being at least 50%
by weight based on the whole filler incorporated in
said composition.
The examiner relies on the following prior art references
as evidence of unpatentability:
Hanson 2,339,546 Jan. 18, 1944
action of March 24, 2000 (paper 26) that the amendment will be
entered for purposes of this appeal.
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