3221978

Information

• Patent Grant
• 3221978

• References
• Source

• Patent Number

  3,221,978

• Date Filed

  Not available

• Date Issued

  Tuesday, December 7, 1965
  59 years ago

• CPC

  • B65B9/24 - the tubes being formed in situ by extrusion

• US Classifications

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