US PATENT SUBCLASS 48 / 212
.~.~ Air injected

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

197 R  DF  PROCESSES {15}
211  DF  .~ Oil {2}
212.~.~ Air injected

DEFINITION

Classification: 48/212

Processes where oil and air are injected into a heated retort. The air may be added to the gas produced from the oil.