US PATENT SUBCLASS 313 / 256
.~.~.~.~ Insulating or ceramic support rod or tube

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
243  DF  .~ For plural electrodes of discharge device {3}
244  DF  .~.~ Envelope supports or forms electrode {5}
252  DF  .~.~.~ Support structure supported by the envelope {7}
256.~.~.~.~ Insulating or ceramic support rod or tube

DEFINITION

Classification: 313/256

(under subclass 252) Discharge devices where the supporting structure is a rod or tube made of insulating or ceramic material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257+, for discharge devices under subclass 252 which have a spacing structure which includes an insulating or ceramic member between the electrodes or electrode supports, or between one or more electrodes or electrode supports and the envelope wall. See subclass 262 where the spacing structure includes a ceramic (e.g., glass) bead.

289, for devices under the class definition which have and envelope and a supporting rod or tube which is formed of insulating or ceramic material for supporting the electrode

of the device.