Appeal No. 1998-2327
Application No. 08/467,619
appealed claim 1 features concerning liquid alkyl methacrylate
being present in the first liquid component and the second
liquid component in amounts sufficient to provide these
respective components as liquid mixtures and wherein the first
chamber and the second chamber are at least substantially free
of air. While the Butler and Yamauchi references may contain
teachings or suggestions of alkyl methacrylate and of first
and second liquid components for liquid bone cement, these
references contain no teaching or suggestion of first and
second chambers which are at least substantially free of air.
Similarly, while the examiner is correct that Chan discloses
forming liquid bone cement in the substantial absence of air,
this objective is achieved via the use of an evacuated chamber
which contains bone cement powder and into which is injected
liquid monomer only when a liquid bone cement is to be
prepared and used.
Thus, none of the applied references contains a teaching
or suggestion of combining the here-claimed features of first
and second liquid components as liquid mixtures and first and
second chambers which are at least substantially free of air.
Only the appellant’s own disclosure teaches combining these
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