US PATENT SUBCLASS 73 / 1.86
.~.~ Reference standard detail

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.82  DF  .~ Apparatus for measuring by use of vibration or apparatus for measuring vibration (e.g., acoustic or ultrasonic) {4}
1.86.~.~ Reference standard detail

DEFINITION

Classification: 73/1.86

Reference standard detail:

(under subclass 1.82) Subject matter including a means for providing reference criterion which is used for or intended to be used for comparison purposes in order to prove, calibrate, test, or adjust the measuring, testing, or condition responsive device and wherein significance is attributed to the means for providing the reference criterion.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy,

427+, for an electrolytic gas sample sensor, per se, combined with a gas reference material; and subclass 435 for a standard reference electrode in an electrolytic analysis or testing apparatus.

356, Optics: Measuring and Testing,

243, for an apparatus for measuring or testing visible light including structure forming a basis for comparison with a specimen or a portion thereof under test.

436, Chemistry: Analytical and Immunological Testing, particularly

8+, for a composition for standardization, calibration, simulation, or processes of use in preparation for chemical testing.