Appeal 2007-1024
Application 10/231,144
Does the prior art teach a non-aqueous electrolyte secondary
battery having a positive electrode material layer formed with a
mixture of binders, where the binders have contact angles
differing by more than 15o?
Does the prior art teach a non-aqueous electrolyte battery
having the claimed combination of binders such that a
conductive agent contained in the positive electrode material
layer forms agglomerated particles having a particle size of less
than 10 μm?
FINDINGS OF FACT
A. Applicant’s ‘144 Specification and Claims
1) Applicant’s claims on appeal are directed to a non-aqueous electrolyte
secondary battery where battery contains a positive electrode material layer
formed of a paste comprising a positive electrode active material, a
conductive agent, a first binder A and a second binder B. (Appeal Br.
Independent claim 17).
2) Applicant’s claims require that the first and second binder materials
have contact angles between the binder and the non-aqueous electrolyte that
differ by 15o or more. (Id.).
3) Applicant claim 13, depends from independent claim 17, and states
that binder A is selected from the group consisting of polyvinylidene
fluoride, modified polyvinylidene fluoride and polytetrafluoroethylene.
(Appeal Br., Claims Appendix, and also Specification 6).
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