Appeal No. 93-3623 Page 9
Application 07/629,690
express teachings of Urdea itself for understanding what Urdea
would have meant to a person having ordinary skill in the art.
14. We find that Urdea is an appropriate reference in the
field of Appellant's endeavor: continuous-flow reactors for
protein or peptide analysis.
15. We further find that, to the extent that either Hrdina
or Urdea alone might not independently teach or suggest a
continuous-flow reactor for protein or peptide sequencing,
together they provide a foundational teaching in the field of
continuous-flow reactors for protein or peptide analysis.
B. Leak-tight interference fit joints
16. Claim 1 further requires
the inside and outside diameters of said reaction
chamber tube and said first and second connecting tubes
being so dimensioned that two leak-tight interference
fit joints are provided by inserting one end section of
a tube into the end section of another tube, one of
said leak-tight interference fit joints being provided
between said first tube and said reaction chamber and
the other being provided between said second tube and
said reaction chamber.
Appellant's disclosure
17. Appellant discloses that leak-proof joints are the
result of interference or press fits between supply/drain tubes
12/16 and a reaction tube 14, with a specified size relationship.
(Paper 1 at 6.) The disclosed relationship is a 1:2 ratio in
outer diameter, where the inner diameter of the reaction tube is
almost as large the supply/drain tubes' outer diameter. (Paper 1
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