US PATENT SUBCLASS 313 / 577
.~.~ Less than .1 torr

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

567  DF  WITH GAS OR VAPOR {24}
568  DF  .~ Having a particular total or partial pressure {4}
577.~.~ Less than .1 torr

DEFINITION

Classification: 313/577

Less than .1 torr:

(under subclass 568) Subject matter wherein the total or partical pressure of the gas or vapor is below one-tenth torr.

SEE OR SEARCH THIS CLASS, SUBCLASS:

233, for lamp or discharge devices which are defined in terms of the magnitude of the vacuum of the lamp or discharge device.