US PATENT SUBCLASS 392 / 305
.~.~ Suspended by cable in well

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
301  DF  .~ Borehole type {5}
305.~.~ Suspended by cable in well

DEFINITION

Classification: 392/305

Suspended by cable in well:

(under subclass 301) Subject matter wherein the heating device is supported from a well-head by a flexible line-like member.