US PATENT SUBCLASS 502 / 47
.~.~.~.~ Generally countercurrent flow of oxygen containing gas and material

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

20  DF  REGENERATING OR REHABILITATING CATALYST OR SORBENT {4}
34  DF  .~ Gas or vapor treating {5}
38  DF  .~.~ Treating with free oxygen containing gas {8}
45  DF  .~.~.~ Moving bed (e.g., vertically or horizontally, etc., moving bulk material) {3}
47.~.~.~.~ Generally countercurrent flow of oxygen containing gas and material

DEFINITION

Classification: 502/47

Generally countercurrent flow of oxygen containing gas and material:

(under subclass 45) Process in which the treating fluid and the catalyst or sorbent are fed in opposite directions.