Appeal No. 2003-0079 Page 6
Application No. 09/532,114
227 USPQ 972, 973 (Bd. Pat. App. & Int. 1985). To this end, the requisite motivation
must stem from some teaching, suggestion or inference in the prior art as a whole or
from the knowledge generally available to one of ordinary skill in the art and not from
the appellant's disclosure.See, for example, Uniroyal. Inc. v. Rudkin-Wiley Corp., 837
F.2d 1044, 1052,5 USPQ2d 1434, 1439 (Fed. Cir.), cert. denied, 488 U.S. 825 (1988).
Ikeda discloses a dual fuel internal combustion engine in which the objective is to
improve the performance of the engine by adding a gaseous fuel to the liquid fuel. The
examples given for the liquid fuel include ethanol, alcohol and gasoline, and acetylene
is mentioned as one of the gaseous fuels (translation, page 3). The liquid fuel is
provided by means of a carburetor (3) located in the air inlet conduit.The gaseous fuel
is furnished through a "nozzle" (8) positioned in the air inlet conduit downstream of the
carburetor, but upstream of the engine. In the sentence bridging pages 3 and 4 of the
translation, the statement is made that "[i]n short, the engine which uses only gasoline
before can be operated by controlling it so that various liquid fuels being [sic, are the]
main body [of the fuel] and various gaseous fuels are added in a suitable ratio without
necessity to make a sharp adjustment of engine." That the liquid fuel is the primary fuel
and the gaseous fuel is secondary is confirmed by the ratios set forth in the examples
in the reference. The only example in which acetylene was used as the gaseous fuel
was Test 4, where the liquid fuel was a mixture of ethanol and gasoline, and the liquid
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