US PATENT SUBCLASS 229 / 122.32
.~ Multi-layer side or bottom wall having two or more layers of paperboard which are initially separate from each other and are coextensive with each other throughout substantially the entire extent of the wall

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

100  DF  PAPERBOARD BOX {54}
122.32.~ Multi-layer side or bottom wall having two or more layers of paperboard which are initially separate from each other and are coextensive with each other throughout substantially the entire extent of the wall {2}
122.33  DD  .~.~> Including a vertically extending open-ended tube
122.34  DD  .~.~> Including a multilayer bottom wall