US PATENT SUBCLASS 73 / 1.04
.~.~.~ Permeable outlet or flawed element

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.02  DF  .~ Gas or liquid analyzer {2}
1.03  DF  .~.~ Reference standard {2}
1.04.~.~.~ Permeable outlet or flawed element

DEFINITION

Classification: 73/1.04

Permeable outlet or flawed element:

(under subclass 1.03) Subject matter wherein the reference standard comprises (a) a barrier having interstices, pores, or micropores through which the liquid or gas diffuses or (b) a solid body having a known imperfection which is detected by the gas or liquid.