US PATENT SUBCLASS 48 / 208
.~.~ Up-and-down run

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

197 R  DF  PROCESSES {15}
204  DF  .~ Water {4}
208.~.~ Up-and-down run

DEFINITION

Classification: 48/208

Processes in which steam is caused to pass upwardly and downwardly, or vice versa, through a body or separate bodies of incandescent fuel.