US PATENT SUBCLASS 494 / 25
.~ Gas other than air

Current as of: June, 1999
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494 /   HD   IMPERFORATE BOWL: CENTRIFUGAL SEPARATORS

23  DF  WITH MEANS FOR FURNISHING AUXILIARY FLUID TO MATERIAL OR APPARATUS {4}
25.~ Gas other than air

DEFINITION

Classification: 494/25

Gas other than air:

(under subclass 23) Apparatus wherein the fluid introduced is in the nature of a gas, and wherein the gas has a composition

which serves to distinguish it from that gas commonly considered to constitute "air".