US PATENT SUBCLASS 502 / 39
.~.~.~ And forming useful by-product

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}
39.~.~.~ And forming useful by-product

DEFINITION

Classification: 502/39

And forming useful by-product:

(under subclass 38) Process in which a second material or energy of value, apart from the catalyst or sorbent composition is obtained.

(1) Note. The by-product forming does not include recovering or separating of a reaction product or a sorbed component resulting from the process in which the composition of this class became spent. See (2) Note of subclass 20. The by-product includes e.g., collected carbon oxide gas from combustion of carbonaceous material fouling a catalyst or heat of oxidation used to provide a source of power. The use of heat generated in a process of rehabilitation to preheat the treating agent, sorbent, or catalyst is not considered to be forming a by-product.