US PATENT SUBCLASS 48 / 99
.~.~ Coal and water

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

61  DF  GENERATORS {4}
89  DF  .~ Retort {12}
99.~.~ Coal and water

DEFINITION

Classification: 48/99

Combined retorts for the gasification of coal and means for introducing water, steam, or water-gas.