US PATENT SUBCLASS 73 / 152.33
.~.~.~ Thermal

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

152.01  DF  BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6}
152.18  DF  .~ Fluid flow measuring or fluid analysis {6}
152.29  DF  .~.~ Rate of fluid flow {5}
152.33.~.~.~ Thermal

DEFINITION

Classification: 73/152.33

Thermal:

(under subclass 152.29) Subject matter wherein the determination of the physical characteristic of the borehole, the casing, or the drill rigging is made by measuring an effect of the rate of flow fluid upon temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

170.12, for thermal measurement of fluid flow direction or of fluid flow velocity.

202.5, for thermal sensing of a fluid flow in a proportional flow meter.

204.11+, for a thermal measurement of fluid flow, per se.

861.95, for fluid flow determination by measuring transit time of a thermal tracer or tag.

SEE OR SEARCH CLASS 374, Thermal Measuring and Testing, appropriate subclass for measuring and testing the thermal effect, per se, of a fluid, particularly

29+, for heat flow measurement and subclasses 43+ for heat coefficient measuring.