US PATENT SUBCLASS 229 / 315
.~.~.~.~ Including means to prevent contents from extending into the removable portion

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

68.1  DF  ENVELOPE {10}
307  DF  .~ Having means to facilitate opening the envelope by severing it (e.g., tearing, cutting, piercing, etc.) {3}
313  DF  .~.~ Line of weakness {2}
314  DF  .~.~.~ Lines of weakness in opposed walls form removable envelope portion {1}
315.~.~.~.~ Including means to prevent contents from extending into the removable portion

DEFINITION

Classification: 229/315

Including means to prevent contents from extending into the removable portion:

(under subclass 314) Subject matter wherein the envelope includes a modification which keeps the envelope contents completely within the remainder of the envelope prior to the removable envelope portion being separated from the remainder.