Appeal No. 2002-1059
Application No. 09/051,933
comprises a particulate carbon material of artificial graphite
which has a volume resistivity not exceeding 5.0 x 10-3ohm.cm
wherein the filling density of the particulate carbon material
ranges from 1.2 to 1.40 g/cc. According to the appellants’
specification, a lithium ion secondary battery which contains
such a negative electrode exhibits the desirable characteristic
of relatively low heat generation when internal short-circuiting
takes place. This appealed subject matter is adequately
illustrated by independent claim 17 which reads as follows:
17. A negative electrode for a lithium secondary battery,
the electrode comprising a particulate carbon material enabling
the absorption and release of lithium ions, and a binder;
in which:
the particulate carbon material is artificial graphite;
the particulate carbon material has a volume resistivity not
exceeding 5.0 x 10-3ohm.cm; and
the filling density of the particulate carbon material
ranges from 1.2 to 1.40 g/cc.
The reference set forth below is relied upon by the examiner
as evidence of obviousness:
Takami et al. (Takami) 5,340,670 Aug. 23, 1994
All of the claims on appeal are rejected under 35 U.S.C.
§ 103(a) as being unpatentable over Takami.
2
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007