US PATENT SUBCLASS 502 / 34
.~ Gas or vapor treating

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.~ Gas or vapor treating {5}
35  DF  .~.~> Using halogen containing substance including liquids vaporizable upon contacting spent catalyst or sorbent {2}
38  DF  .~.~> Treating with free oxygen containing gas {8}
53  DF  .~.~> Elemental hydrogen
54  DF  .~.~> Ammonia or derivative thereof
55  DF  .~.~> Steam

DEFINITION

Classification: 502/34

Gas or vapor treating:

(under subclass 20) Process in which the treating material is a readily diffusive fluid, tending to expand indefinitely and with molecules in free movement.

(1) Note. This subclass provides for the use of normally liquid material which becomes gaseous under the prevailing conditions (e.g., temperature above its boiling point).

SEE OR SEARCH THIS CLASS, SUBCLASS:

30, for the use of a gas in conjunction with an organic liquid to regenerate a catalyst or sorbent.