US PATENT SUBCLASS 229 / 159
.~.~.~ Extension formed of two or more thickness of box material

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

100  DF  PAPERBOARD BOX {54}
124  DF  .~ With closure for an access opening {7}
126  DF  .~.~ Foldable wall extension (e.g., closure flap) {13}
159.~.~.~ Extension formed of two or more thickness of box material

DEFINITION

Classification: 229/159

Extension formed of two or more thicknesses of box material:

(under subclass 126) Subject matter wherein the extension is formed of at least two layers of stock material. [figure]