3369568

Information

• Patent Grant
• 3369568

• References
• Source

• Patent Number

  3,369,568

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1968
  57 years ago

• CPC

  • B21D51/28 - Folding the longitudinal seam
  • B65D7/38 - formed by soldering, welding, or otherwise uniting opposed surfaces

• US Classifications

  • 138 - Pipes and tubular conduits
  • 220 - Receptacles
  • 229 - Envelopes, wrappers, and paperboard boxes