US PATENT SUBCLASS 204 / 540
.~.~.~.~ Biological material prepared, recovered, or treated (e.g., urine, etc.)

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

*  DD  PROCESSES AND PRODUCTS {7}
450  DF  .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14}
518  DF  .~.~ Barrier separation (e.g., using membrane, filter paper, etc.) {5}
520  DF  .~.~.~ Ion selective {8}
540.~.~.~.~ Biological material prepared, recovered, or treated (e.g., urine, etc.)

DEFINITION

Classification: 204/540

Biological material prepared, recovered, or treated (e.g., urine, etc.):

(under subclass 520) Process in which biological material is prepared, recovered, or treated (e.g., urine, etc.).

(1) Note. This subclass does not provide for electro-osmotic barrier separation involving preparation, recovery, or treatment of a fluid (e.g., air, carbon dioxide, etc.) which may be metabolized or may be the result of a metabolic process unless the fluid is specifically disclosed in connection with a metabolic or biological process or organism.

SEE OR SEARCH THIS CLASS, SUBCLASS:

527, for electrophoretic or electro-osmotic ion selective barrier separation of biological material using alternating anion and cation selective membranes.

543, for electrophoretic or electro-osmotic nonion selective barrier separation of biological material.