US PATENT SUBCLASS 493 / 917
.~ Envelope

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

916  DF  PLIABLE CONTAINER {12}
917.~ Envelope {6}
918  DF  .~.~> Expandable
919  DF  .~.~> Having window
920  DF  .~.~> Having plural compartments
921  DF  .~.~> Having integrally formed insert
922  DF  .~.~> Having liner
923  DF  .~.~> With opening means (e.g., tear strip, valve, etc.)

DEFINITION

Classification: 493/917

Envelope:

(under subclass 916) Operation involving the construction of a receptacle that in use consists of a front planar and a rear planar wall connected together about the periphery of each.

(1) Note. The connection of the front and rear wall may be a fluted section to allow expansion of the container but is intended to be as small as practical.