Appeal No. 1997-0793
Application 08/107,633
combustion chamber and the gas generator have fluidized beds
(col. 10, lines 6-13). The output from the gas generator
includes combustible gases (col. 2, line 54 - col. 3, line 4)
and “[a] fluidized stream of solids which is now largely free
from carbon” (col. 3, lines 7-8). The teaching that the
stream is “largely free from carbon” indicates that it
contains some coke particles as required by appellant’s claim
1.
Step c: Roetheli discloses that “[i]f desired, the whole
or a portion of the gas resulting from coal carbonization may
be admixed with the water gas” (col. 3, lines 3-5). Because
the gas stream (12) from the carbonization chamber contains
dust (col. 2, lines 23-32), the reference would have fairly
suggested, to one
of ordinary skill in the art, as argued by the examiner
(answer, pages 7-8), combining the gas streams upstream of the
dust separator (21) so that the dust in both streams can be
removed by the dust separator.
Step d: The suggested combined stream to the dust
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