US PATENT SUBCLASS 427 / 458
.~ Electrostatic charge, field, or force utilized

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

457  DF  DIRECT APPLICATION OF ELECTRICAL, MAGNETIC, WAVE, OR PARTICULATE ENERGY {15}
458.~ Electrostatic charge, field, or force utilized {7}
459  DF  .~.~> Fluidized bed utilized {2}
462  DF  .~.~> Flock or fiber applied {1}
466  DF  .~.~> Nonuniform or patterned coating (e.g., ink jet printing, etc.) {3}
470  DF  .~.~> Superposed diverse or multilayer similar coatings applied
471  DF  .~.~> Applying coatings to opposite sides of a substrate (excluding processes where all coating is by immersion)
472  DF  .~.~> Positioning, orientation, or application of nonsprayed, nonatomized coating material solely by electrostatic charge, field, or force {2}
475  DF  .~.~> Solid particles or atomized liquid applied {5}

DEFINITION

Classification: 427/458

Electrostatic charge, field, or force utilized:

(under subclass 457) Processes utilizing static electricity, that is an electrical charge at rest, to effect deposition or orientation of an externally supplied coating material.

(1) Note. Electrostatic energy is a form of electrical energy which has the capability of attracting and holding small particles having an opposite electrical charge.

(2) Note. An electrostatic charge is an electric charge stored in a capacitor or on the surface of an insulated object.

(3) Note. An electrostatic field is the vector force field set up in the vicinity of non-moving electrical charges.

SEE OR SEARCH THIS CLASS, SUBCLASS:

180, for processes of applying particles or fibers to a substrate without the use of an electrostatic force.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for use Therein, Consolidated Metal Powder Compositions, etc., 255, for a loose mixture containing metal particles. Subclass 10.67 for electromagnetic or electrostatic processes.

118, Coating Apparatus,

620+, for coating apparatus utilizing an electrostatic charge, force, or field.

219, Electric Heating,

600+, for electrostatic heating, per se. If there is a subsequent step of coating involved the original is classified in Class 427. If there is other subsequent treatment involved the original is classified with the art to which the other subsequent treatment pertains.

239, Fluid Sprinkling, Spraying, and Diffusing,

3, for processes of spraying wherein an electrostatic charge is employed and the intent of the sprinkling, spraying, and diffusing is not to coat.

361, Electricity: Electrical Systems and Devices,

225+, and 230+ for apparatus used to apply an electrical charge to materials, per se.

399, Electrophotography,

57, for liquid control developing, subclasses 58+ for concentration control of developing material, subclasses 168+ for charging, subclasses 246+ for sprayed liquid developing, subclass 248 for immersion, and subclasses 265+ for application of dry developing.