US PATENT SUBCLASS 134 / 22.15
.~.~.~ With steam utilization

Current as of: June, 1999
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134 /   HD   CLEANING AND LIQUID CONTACT WITH SOLIDS

*  DD  PROCESSES {23}
22.1  DF  .~ Hollow work, internal surface treatment {7}
22.11  DF  .~.~ Pipe, tubing, hose, or conduit {4}
22.15.~.~.~ With steam utilization

DEFINITION

Classification: 134/22.15

With steam utilization:

(under subclass 22.11) Subject matter wherein the process includes at some stage the use of water in its gas or vapor form.