US PATENT SUBCLASS 430 / 120
.~.~ Dry powder developing

Current as of: June, 1999
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430 /   HD   RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF

31  DF  ELECTRIC OR MAGNETIC IMAGERY, E.G., XEROGRAPHY, ELECTROGRAPHY, MAGNETOGRAPHY, ETC., PROCESS, COMPOSITION, OR PRODUCT {18}
97  DF  .~ Post imaging process, finishing, or perfecting composition or product {12}
120.~.~ Dry powder developing {3}
121  DF  .~.~.~> Cascade
122  DF  .~.~.~> Using magnetic brush
123  DF  .~.~.~> Using fur brush

DEFINITION

Classification: 430/120

Dry powder developing:

(under subclass 97) Processes wherein the application of dry powder to an image develops that image.

SEE OR SEARCH CLASS

399, Electrophotography,

9+, for diagnostics, subclasses 38+ for controls, and subclasses 222+ for development, particularly subclasses 252+ for electrophotos:graphic apparatus employing this type of subject matter.