US PATENT SUBCLASS 73 / 861.05
.~ By measuring transit time of 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.~ By measuring transit time of tracer or tag {2}
861.06  DF  .~.~> With autocorrelation or cross-correlation detection
861.95  DF  .~.~> Thermal tracer or tag

DEFINITION

Classification: 73/861.05

By measuring transit time of tracer or tag:

(under subclass 861) Subject matter responsive to the time elapsed for a detectable property of the fluid or a detectable body or substance introduced into the fluid to travel a fixed distance.

(1) Note. For the purposes of this subclass, a body or substance that divides the fluid into segments is a tracer if it does not impede the fluid flow.