3642191

Information

• Patent Grant
• 3642191

• References
• Source

• Patent Number

  3,642,191

• Date Filed

  Not available

• Date Issued

  Tuesday, February 15, 1972
  53 years ago

• CPC

  • B65D27/12 - Closures
  • B65D27/02 - with stiffening inserts

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes
  • 434 - Education and demonstration