US PATENT SUBCLASS 436 / 174
INCLUDING SAMPLE PREPARATION

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

174INCLUDING SAMPLE PREPARATION {6}
175  DF  .~> Digestion or removing interfering materials
176  DF  .~> Stabilizing or preserving
177  DF  .~> Liberation or purification of sample or separation of material from a sample (e.g., filtering, centrifuging, etc.) {1}
179  DF  .~> Dilution
180  DF  .~> Volumetric liquid transfer
181  DF  .~> Gaseous sample or with change of physical state

DEFINITION

Classification: 436/174

INCLUDING SAMPLE PREPARATION:

(under the class definition) Processes including treatment of the material to be analyzed to facilitate subsequent analysis.

(1) Note. This subclass provides for documents which claim subcombinations of chemical tests which are not provided for in a chemical, electrical, or optical class. There may be only nominal claim language to chemical analysis.

SEE OR SEARCH CLASS

73, Measuring and Testing, for a sampling process which is not claimed or solely disclosed as part of a process of chemical analysis and the search notes therein for other

classes providing for sampling techniques.