2251391

Information

• Patent Grant
• 2251391

• References
• Source

• Patent Number

  2,251,391

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1941
  83 years ago

• CPC

  • B65D27/32 - Opening devices incorporated during envelope manufacture
  • B65D27/14 - using adhesive applied to integral parts

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes