Appeal 2006-2453
Application 10/302,391
19) Bray also discloses that adhesives used to bond the materials used in
the cartridges may be polyurethanes, epoxy resin formulations and
“other polymeric adhesives such as those which are polymers or
copolymers of vinyl resins.” Col. 5, ll. 45-50.
20) Dr. Haitao Cheng, the named inventors in the present application,
testified that prior to November 22, 2002, the filing date of the present
application, “conventional wisdom held that single-component UV-
cured adhesives were generally weaker, less flexible, and less
chemically resistant than two-component heat-cured adhesives.”
Cheng Declaration, ¶ 7.
21) Dr. Cheng further testified:
At the time the invention disclosed in the
subject application was made, to my knowledge,
known UV curable adhesives would not have been
suitable for use in fold protection in spiral filtration
modules. Specifically, known UV curable
adhesives did not have the combination of
flexibility, hardness and chemical resistance
required for such applications. More specifically,
known UV curable adhesives did not combine
flexibility, hardness in the Shore A range and
resistance to chemicals selected from the group
consisting of chlorine, acidic cleaning solutions
and caustic cleaning solutions. [Cheng
Declaration, ¶ 4.]
22) At the time of making his declaration on November 22, 2004, Dr.
Cheng had been employed in research and development of filtration
modules for three years. Cheng Declaration, ¶ 2. At the time of
making his declaration, Dr. Cheng was qualified to testify as to the
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