Appeal No. 96-0881
Application No. 07/795,908
Storey et al.(Storey) 4,202,760 May
13, 1980
Babb et al.(Babb) 4,399,036 August
16, 1983
The appealed claims stand rejected under 35 U.S.C. §
102(b) as anticipated by Babb. Claims 1, 3-6, 8, 9, 11, 13,
14, 16-19, 21, 22, 24, and 26 stand rejected under35 U.S.C. §
102(b) as anticipated by Storey.
The subject matter on appeal is broadly directed to a
method and an associated apparatus for mixing dialysate in a
hemodialysis machine. As explained in appellants’
specification, hemodialysis machines are utilized by persons
having insufficient kidney function and are attached to the
person through an extracorporeal circuit of blood tubing
connected to a dialyzer having a pair of chambers separated by
a thin semi-permeable membrane. In operation, the person’s
blood is circulated through one of the chambers while a flow
of a dialysate is circulated through the other chamber. The
semi-permeable ultrafiltration membrane passes waste materials
and water from the person’s blood to the dialysate. The
composition of a dialysate is typically an aqueous solution of
3
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