US PATENT SUBCLASS 220 / 720
.~ Expanding or contracting portion or component

Current as of: June, 1999
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220 /   HD   RECEPTACLES

694  DF  CONTAINER ATTACHMENT OR ADJUNCT {21}
720.~ Expanding or contracting portion or component {2}
721  DF  .~.~> Pressure or temperature compensating {1}
723  DF  .~.~> Internal bladder-like bag for contents

DEFINITION

Classification: 220/720

Expanding or contracting portion or component:

(under subclass 694) Subject matter wherein the attachment can be located either within or outside the receptacle, or form a section of the receptacle or receptacle wall, and has structure which is changeable in shape or size to permit either an increase or decrease in volume of either a portion of the attachment or a portion of the receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

530, for a flexible partition that changes the volume of a receptacle compartment.