US PATENT SUBCLASS 220 / 216
.~ Floating closure

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
216.~ Floating closure {6}
217  DF  .~.~> With liquid gasket
218  DF  .~.~> Sectional, relatively moveable
219  DF  .~.~> With surface water receiver (e.g., drain)
220  DF  .~.~> With support for aground closure
221  DF  .~.~> With gasket means intermediate closure rim and receptacle {1}
227  DF  .~.~> With vent means

DEFINITION

Classification: 220/216

(under subclass 200) Closures which float on the top of the contained liquid and are in the nature of followers.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

3+, for article supported covers.

73, Measuring and Testing,

322.5, for floats, per se. 137, Fluid Handling,

202, for float controlled discriminating outlet (or vent) for gas, subclasses 430+ for rectilinearly moving floats which are co-axial with the valve or part controlled thereby, note particularly subclass 433 in which the float is the valve or closure or is rigid therewith.