US PATENT SUBCLASS 436 / 178
.~.~ Including use of a solid sorbent, semipermeable membrane, or liquid extraction

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

174  DF  INCLUDING SAMPLE PREPARATION {6}
177  DF  .~ Liberation or purification of sample or separation of material from a sample (e.g., filtering, centrifuging, etc.) {1}
178.~.~ Including use of a solid sorbent, semipermeable membrane, or liquid extraction

DEFINITION

Classification: 436/178

Including use of a solid sorbent, semipermeable membrane, or liquid extraction:

(under subclass 177) Processes wherein the material to be analyzed is concentrated or separated by sorption, ion entrapment, a septum selective as to material or by liquid extraction.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

656+, for a process of chromatos:graphic separation using a solid sorbent and subclass 635 for processes using a liquid or organic gel as a sorbent.