2681172

Information

• Patent Grant
• 2681172

• References
• Source

• Patent Number

  2,681,172

• Date Filed

  Not available

• Date Issued

  Tuesday, June 15, 1954
  70 years ago

• CPC

  • B65D5/4204 - Inspection openings or windows
  • B65D5/2085 - the central panel having incisions defining foldable flaps hinged to its edges
  • B65D5/441 - Reinforcements

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes
  • 220 - Receptacles