US PATENT SUBCLASS 229 / 928
EXPANDABLE ENVELOPE

Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

928EXPANDABLE ENVELOPE

DEFINITION

Classification: 229/928

EXPANDABLE ENVELOPE:

(under the class definition) Envelope including means to adjust its size.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.5, for a file folder.

101+, for a variable volume paperboard box.

SEE OR SEARCH CLASS

383, Flexible Bags,

2, for a bag having a selectively adjustable volume and subclass 120 for a bag having a pleat or gusset.