US PATENT SUBCLASS 204 / 521
.~.~.~.~ Combined with manufacture or pretreatment of barrier


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}
521.~.~.~.~ Combined with manufacture or pretreatment of barrier


DEFINITION

Classification: 204/521

Combined with manufacture or pretreatment of barrier:

(under subclass 520) Process which includes one or more steps of manufacture or pretreatment of the barrier.

SEE OR SEARCH THIS CLASS, SUBCLASS:

470, for gel electrophoresis or gel composition therefor combined with manufacture or preparation of the gel.