US PATENT SUBCLASS 29 / 890.031
.~.~ Repairing, converting, servicing or salvaging


Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.03  DF  .~ Heat exchanger or boiler making {15}
890.031.~.~ Repairing, converting, servicing or salvaging


DEFINITION

Classification: 29/890.031

Repairing, converting, servicing or salvaging:

(under subclass 890.03) Process wherein an existing heat exchanger or boiler is (1) restored or otherwise put in a more functional, stable or improved working condition; (2) mechanically modified or altered to produce an article of substantially different capacity, size, function or type of operation; or (3) treated to recover a portion or the whole thereof which would otherwise constitute discarded material or using such material in a process of mechanical manufacturing.

(1) Note. See the definition of repair in Class 29 Glossary in the Class Definition.

(2) Note. Making a replacement part, per se, is not found in this subclass unless that part is claimed as being installed in the device being repaired.

SEE OR SEARCH THIS CLASS, SUBCLASS:

401.1, for a process of converting. Also see the search notes thereunder.

402.01+, for a process of repairing. Also see the search notes thereunder.

403.1+, for a process including scrap recovery or utilization. Also see the search notes thereunder.