US PATENT SUBCLASS 427 / 545
.~.~ Resistance heating

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}
532  DF  .~ Pretreatment of substrate or post-treatment of coated substrate {9}
545.~.~ Resistance heating {1}
546  DF  .~.~.~> Metal or metal alloy containing coating

DEFINITION

Classification: 427/545

Resistance heating:

(under subclass 532) Processes wherein an electrical current is passed through a substrate before it is coated or an electrical current is passed through a coated substrate to produce heat by means of internal resistance.

(1) Note. This subclass does not include processes wherein the electric current is passed through a heating filament, coil, susceptor, etc., which is not the substrate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

540, wherein an arc or electrical discharge is produced in resistance heating.

SEE OR SEARCH CLASS

219, Electric Heating,

73.11, 73.21, and 76.1+ for metal coating buildup with the

use of resistance heating. Electric welding has to have two preforms being joined, wherein coating is ancillary to the joining of the preforms.