US PATENT SUBCLASS 313 / 41
.~.~.~ Material, roughened surface

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

11  DF  WITH TEMPERATURE MODIFIER {19}
39  DF  .~ For electrode within an envelope {1}
40  DF  .~.~ Radiating type surface {1}
41.~.~.~ Material, roughened surface

DEFINITION

Classification: 313/41

(under subclass 40) Devices in which the radiating surface is either composed of a material or is coated with a material which is designed to readily radiate heat or in which the radiating surface is roughened to facilitate the radiation.