US PATENT SUBCLASS 73 / 864.52
.~.~.~ Preevacuated

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

863  DF  SAMPLER, SAMPLE HANDLING, ETC. {11}
864  DF  .~ Capture device {9}
864.51  DF  .~.~ Receptacle type {5}
864.52.~.~.~ Preevacuated

DEFINITION

Classification: 73/864.52

Preevacuated:

(under subclass 864.51) Subject matter wherein the receptacle is a chamber which has been evacuated prior to its use as a sampler.

SEE OR SEARCH CLASS

166, Wells,

163, for receptacles with separate air chambers for sucking in well fluid.