Appeal No. 1997-4118
Application No. 08/381,814
In addition, it is noted on page 7 of the specification that
the pipe according to the invention is obtained in a known
manner
by coextrusion of the five components under
known extrusion conditions which are
appropriate to each of the thermoplastic
materials. Coextrusion of the five
components facilitates the extrusion of the
middle fluoropolymer layer, especially of
PVDF, which is relatively difficult when
this layer is not "sandwiched."
Appellants’ invention also relates to a method of making the
above described petrol supply pipe and to a method of using
such a petrol supply pipe for feeding petrol to an engine.
A copy of independent claims 9, 16 and 17, as found in
the Appendix to appellants’ brief, is attached to this
decision.
The prior art references relied upon by the examiner in
rejecting the appealed claims are:
Hart et al. (Hart) 4,249,875 Feb. 10,
1981
Brunnhofer 5,076,329 Dec. 31,
1991
Kerschbaumer 5,219,003 Jun. 15,
1993
Nawrot et al. (Nawrot) 5,419,374 May 30,
1995
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