Appeal No. 2000-0180
Application No. 08/539,943
view of Goy, we note that on page 4 of the answer the examiner
has urged that Samson discloses a medical catheter like that
depicted in appellant’s invention “except for the delivery
lumen with a delivery port proximal to the balloon.” To
account for this difference the examiner turns to Goy, noting
that Goy teaches a balloon dilation catheter used for delivery
of drugs and/or contrast medium to the vasculature system via
a second lumen (9) in the catheter which has a delivery port
or opening (10) located proximal to the balloon (22) so as to
allow access to and treatment of blood vessels that branch
from main blood vessels. From these teachings, the examiner
concludes that it would have been obvious to one of ordinary
skill in the art at the time of appellant’s invention to
provide a separate lumen for drug and contrast material
delivery in the catheter of Samson with a delivery port
proximal to the balloon as taught by Goy “since Goy teaches
that it is desired in the art of balloon angioplasty to
provide a delivery lumen and port proximal the balloon so one
can access the branched blood vessels for treatment thereof
and since Goy further teaches that balloon catheters can have
separate lumens for the guidewire and for infusion of drugs or
6
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