US PATENT SUBCLASS 229 / 80
.~.~ Sealing

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

68.1  DF  ENVELOPE {10}
76  DF  .~ Closures {3}
80.~.~ Sealing {4}
80.5  DF  .~.~.~> Releasable or frangible bond (e.g., peel seal)
81  DF  .~.~.~> Perforated
82  DF  .~.~.~> Tongues
83  DF  .~.~.~> Soluble dye

DEFINITION

Classification: 229/80

(under subclass 76) Envelope closures comprising some special mode of closing the envelope by means of an ordinary gummed flap.