US PATENT SUBCLASS 215 / 18
.~.~ Valves

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.~.~ Valves {4}
19  DF  .~.~.~> Single type spring controlled
20  DF  .~.~.~> Single type float controlled
21  DF  .~.~.~> Single type gravity controlled {3}
25  DF  .~.~.~> Multiple type

DEFINITION

Classification: 215/18

(under subclass 17) Nonrefillable receptacles in which the novelty lies particularly in a valve construction. The valves are adapted to allow outflow of the contents, but prevent refilling.