US PATENT SUBCLASS 229 / 139
.~.~.~.~ Three extensions form a pocket to receive fourth extension

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}
138  DF  .~.~.~ Extensions of adjacent box walls hingedly attached together {2}
139.~.~.~.~ Three extensions form a pocket to receive fourth extension

DEFINITION

Classification: 229/139

Three extensions form a pocket to receive fourth extension:

(under subclass 138) Subject matter wherein three hingedly connected extensions are foldable to form a partially enclosed recess which will accept insertion of a fourth extension. [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

184, for similar structure in a bottom wall.