US PATENT SUBCLASS 73 / 861.95
.~.~ Thermal tracer or tag

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

861  DF  VOLUME OR RATE OF FLOW {23}
861.05  DF  .~ By measuring transit time of tracer or tag {2}
861.95.~.~ Thermal tracer or tag

DEFINITION

Classification: 73/861.95

Thermal tracer or tag:

(under subclass 861.05) Subject matter wherein the detectable flow indicating property is a localized thermal change in the fluid being measured.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152.33, for a flowmeter for determining a characteristic of a borehole, a well casing, or a drill rigging by measuring a rate of fluid flow responsive to a thermal property of a fluid.

204.11+, for a flowmeter which measures the thermal effect of flow on a sensor.