US PATENT SUBCLASS 427 / 111
.~ Filament for lamp or tube

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

58  DF  ELECTRICAL PRODUCT PRODUCED {21}
111.~ Filament for lamp or tube {1}
112  DF  .~.~> Carbon filament

DEFINITION

Classification: 427/111

(under subclass 58) Processes wherein the coated product is a conductor which is heated by the passage of current therethrough and the intended use is in a lamp or tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77+, for processes of coating a filament with an electron emissive coating.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

341+, for electric lamp filaments.