Appeal No. 1996-1896
Application No. 08/206,973
As required by the appealed claims, Emken and Accuntius
disclose a method of coating pyrocarbon onto a substrate in a
fluidized bed in the presence of particles to obtain a precise
thickness of deposit of pyrocarbon of uniform crystalline
structure and uniform physical properties on the substrate.
See Emken, column 3, lines 15-20 and Accuntius, column 10,
lines 14-20. The examiner finds that the method involves
fluidizing both the particles and the substrate with a
levitating gas comprising an inert gas, heating both the
particles and the substrate to a pyrolysis temperature and
supplying a mixture of a hydrocarbon component as a part of
the levitating gas to produce and deposit pyrocarbon on
surfaces of the substrate and the particles. See Answer,
pages 3-5 and 7-9. The examiner finds that Emken also teaches
monitoring the weight of the fluidized bed to determine the
change in weight over a period of time. See Answer, page 3.
The examiner finds that Accuntius also teaches monitoring the
differential pressure between a location within or below the
bed and a location above the bed to determine the change in
the pressure difference. See Answer, page 7. According to
the examiner (Answer, pages 3 and 7), in response to the
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