US PATENT SUBCLASS 313 / 231.31
.~ Plasma

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

231.01  DF  FLUENT MATERIAL SUPPLY OR FLOW DIRECTING MEANS {3}
231.31.~ Plasma {1}
231.41  DF  .~.~> Arc discharge type {2}

DEFINITION

Classification: 313/231.31

Plasma:

(under subclass 231.01) Subject matter including means for producing a plasma.

(1) Note. Usually plasmas have a neutral net charge, but not necessarily so.

SEE OR SEARCH THIS CLASS, SUBCLASS:

231.71, for arc discharge devices which produce visible light.