US PATENT SUBCLASS 251 / 315.05
.~.~.~ Nonmetallic

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

304  DF  ROTARY VALVES {5}
315.01  DF  .~ Ball valve {7}
315.03  DF  .~.~ Of specific material {2}
315.05.~.~.~ Nonmetallic

DEFINITION

Classification: 251/315.05

Nonmetallic:

(under subclass 315.03) Material which is not made of an element conductive to heat and electricity (e.g., synthetic resin).