US PATENT SUBCLASS 313 / 266
.~.~.~.~ Stem or envelope structure

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
266.~.~.~.~ Stem or envelope structure

DEFINITION

Classification: 313/266

(under subclass 252) Devices which have the structure of the envelope part or the envelope stem or press which supports the electrode supporting wire, rod or tube modified.

(1) Note. This subclass includes patents where significant structure of the envelope part, stem or press which supports the electrode supporting wire, rod or tube is claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

242, where the discharge device has a shield supported by or forming part of the envelope stem.

246+, for discharge devices under subclass 243 which have at least a portion of the envelope wall formed of metal or conductive material, the metallic or conductive portion being designed for use as an electrode, means being provided to support an electrode within the discharge device.

248, for discharge devices under subclass 243 which have have at least a part of the envelope wall formed of metal or conductive material, a plurality of electrodes being supported by the metallic or conductive wall of the envelope.

271, for devices under subclass 238 where the device has an envelope and a filament supported within the envelope, the structure of the envelope part or the envelope stem or press which supports the electrode supporting structure being modified. 290, for miscellaneous devices under subclass 238 where the device has an envelope and an electrode supported within the envelope, the structure of the envelope part or the envelope stem or press which supports the electrode supporting structure being modified.

317+, and the classes and subclasses specified in the notes to the definition of those subclasses for the structure of envelopes for discharge devices and electric lamps.

626, for gas or vapor type discharge devices which have a shield (where may be a part of the envelope wall, stem or press) for an electrode support.