Appeal No. 98-1640
Application 08/535,850
substantially uniformly atomize the “mixture” of steam and
heavy petroleum hydrocarbon (specification, page 8). The angle
of slits in the second nozzle, relative to the longitudinal
axis of the hydrocarbon conduit, for the passage of the
“mixture” of steam and heavy petroleum hydrocarbon, will
depend on the usage of the nozzles (specification, page 9).
We turn now to the patent applied by the examiner.
The Nielsen patent (Figure 6) teaches a nozzle, suitable
for use in a catalytic cracking unit, which provides good
atomization of a heavy oil feed (column 1, lines 38 through
40). Oil and atomizing gas are “mixed” by a sheet of atomizing
gas breaking down a sheet of oil to effect a “mixture” of oil
droplets in the atomizing gas (column 2, lines 11 through 26
and column 5, line 61 to column 6, line 16). “Optimal
atomization” can be obtained where the sheet of steam and the
sheet of oil flow into each other in a generally orthogonal
relationship (column 6, lines 17 through 19).
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