Appeal No. 2004-0479
Application No. 09/780,864
10. Cambron states in the specification that "[c]atheter 15 is
formed from a polyurethane which is radiopaque, and preferably
optical transparent." See Cambron, column 4, lines 48-49.
As pointed out above, Cambron's figure 2 shows the
catheter 15 and hub 16 assembly being one piece and have the
same cross hatching denoting that the assembly is made of one
material. Although the specification only specifically states
that the catheter 15 is made of polyurethane, when reading
Cambron's specification as a whole, those skill in the art
would have concluded that catheter 15 and hub 16 are to be
made of polyurethane as shown in figure 2.
From the above facts, Cambron teaches that the catheter
and hub assembly is be made of polyurethane due to
polyurethane's optical transparent characteristic. Cambron
teaches that polyurethane's optically transparent
characteristic is important because it allows the operator to
detect or observe the flow of blood from the vein of the host
to the blood chamber 14 by the naked eye under normal lighting
condition. Catheter 15 and hub 16 are in this pathway and
thereby Cambron would have taught those skilled in the art
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