3552640

Information

• Patent Grant
• 3552640

• References
• Source

• Patent Number

  3,552,640

• Date Filed

  Not available

• Date Issued

  Tuesday, January 5, 1971
  54 years ago

• CPC

  • B65D5/0005 - of variable capacity
  • B65D27/00 - Envelopes or like essentially-rectangular containers for postal or other purposes having no structural provision for thickness of contents
  • Y10S229/928 - Expandable envelope

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes
  • 383 - Flexible bags