US PATENT SUBCLASS 204 / 600
.~ Electrophoretic or electro-osmotic apparatus

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

193  DF  APPARATUS {5}
600.~ Electrophoretic or electro-osmotic apparatus {11}
601  DF  .~.~> Capillary electrophoresis type {4}
606  DF  .~.~> Gel electrophoresis type {7}
622  DF  .~.~> Coating or forming means {2}
627  DF  .~.~> Barrier separator (e.g., electrodialyzer, etc.) {5}
641  DF  .~.~> Absorbent strip (e.g., cellulose acetate, paper strip, etc.) type {1}
643  DF  .~.~> Dielectrophoretic (i.e., uses nonuniform electric field)
644  DF  .~.~> Isoelectric focusing (i.e., uses pH variation)
645  DF  .~.~> Isotachophoretic (i.e., displacement electrophoretic) or means to measure ion or particle mobility
647  DF  .~.~> Particle bed separator (e.g., inert particles, ion exchange beads, etc.)
648  DF  .~.~> Bulk separator for solids and liquids (e.g., to dewater solids, clarify water, etc.) {1}
650  DF  .~.~> With moving or movable electrode

DEFINITION

Classification: 204/600

Electrophoretic or electro-osmotic apparatus:

(under subclass 193) Apparatus used to conduct processes involving (a) the travel, transport, or relative movement of one or more particles or components in a conducting liquid or fluent material, other than a gas, under a net unidirectional electric stress or (b) the movement of a liquid inside the capillary spaces of a solid (e.g., membrane, etc.) under the influence of an electric field.

(1) Note. For the purpose of Class 204, "electrophoresis" is restricted to situations where the liquid or fluent material is electrically conductive and wherein there is at least one electrolytic phenomenon (e.g., electrode gas formation, etc.) inherently or otherwise taking place simultaneously with the electromigration of particles.

(2) Note. "Electrophoretic display devices" or other

systems which employ an electrostatic field or a dielectric suspending liquid or fluent material for particles undergoing motion are more properly classified in the appropriate electrical class (e.g., 355, 358, 359, etc.).

(3) Note. In electrophoresis, the moved particles usually are electrically charged.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194+, for electrolytic apparatus.

450+, for corresponding processes of electrophoresis or electro-osmosis. 660+, for electrical apparatus used to separate or purify liquids.

SEE OR SEARCH CLASS

340, Communications: Electrical, appropriate subclasses for subject matter relating to electrical communications which is not provided for elsewhere.

356, Optics: Measuring and Testing,

344, for processes and apparatus for testing the change in the refractive index of a fluid in an electrophoresis cell and subclasses 128+ for other refraction testing processes and apparatus therefor.

358, Facsimile, for pictorial communication systems and methods.

359, Optics: Systems (Including Communication) and Elements, appropriate subclasses for optical elements and systems not provided for elsewhere.

399, Electrophotography,

9+, for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.