US PATENT SUBCLASS 215 / 21
.~.~.~ Single type gravity controlled

Current as of: June, 1999
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215 /   HD   BOTTLES AND JARS

14  DF  NONREFILLABLE {3}
17  DF  .~ Guard or valve type {3}
18  DF  .~.~ Valves {4}
21.~.~.~ Single type gravity controlled {3}
22  DF  .~.~.~.~> Separate disconnected weight
23  DF  .~.~.~.~> Pendant weight
24  DF  .~.~.~.~> Pivoted

DEFINITION

Classification: 215/21

(under subclass 18) Subject matter which are actuated by gravity. These valves depend on their own inherent weight and not on any external weight for their operation.