US PATENT SUBCLASS 73 / 152.25
.~.~.~.~ With a filter

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}
152.23  DF  .~.~ With sampling {3}
152.24  DF  .~.~.~ From formation wall {2}
152.25.~.~.~.~ With a filter

DEFINITION

Classification: 73/152.25

With a filter:

(under subclass 152.24) Subject matter including a barrier having interstices, pores, or micropores through which at least part of the fluid flows but which traps some components of the fluid, usually particles.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61.72, for making a determination of solid components of a liquid by separation of the solid from the liquid and subsequent measuring.

863.23, for sampling, per se, combined with using a filter to separate constituents of a sample.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation, appropriate subclass for a filter, per se.