US PATENT SUBCLASS 313 / 485
.~.~ Phosphor on envelope wall

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

483  DF  WITH LUMINESCENT SOLID OR LIQUID MATERIAL {4}
484  DF  .~ With gaseous discharge medium {1}
485.~.~ Phosphor on envelope wall {6}
486  DF  .~.~.~> Including particular phosphor {1}
488  DF  .~.~.~> Aperture-type tube
489  DF  .~.~.~> With protective coating or filter
490  DF  .~.~.~> With amalgam
491  DF  .~.~.~> Electrode structure or material {1}
493  DF  .~.~.~> Envelope structure or material

DEFINITION

Classification: 313/485

(under subclass 484) Subject matter which includes an envelope and fluorescent or phosphorescent material applied to or embedded in the wall of the envelope.

(1) Note. The fluorescent or phosphorescent material may be in direct contact with the envelope wall or separated from it by a layer or coating on the envelope for example, a phosphor layer overlying a protective layer disposed directly on the envelope wall.

(2) Note. The fluorescent or phosphorescent material may be applied as a coating to either the interior or the exterior of the envelope.

(3) Note. Included here are devices having two envelopes where the fluorescent or phosphorescent material may be applied to or embedded in either envelope wall, however, generally a high pressure discharge tube is enclosed and supported within a sealed outer envelope which is internally coated with a phosphor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

461+, for cathode-ray tubes which have a florescent or phosphorescent material applied to the envelope wall.