3897720

Information

• Patent Grant
• 3897720

• References
• Source

• Patent Number

  3,897,720

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1975
  49 years ago

• CPC

  • B31B41/00 - Machinery characterised by making envelopes or bags of other specific form or construction
  • B65D27/08 - with two or more compartments
  • B31B2221/05 - the bags having multilayered walls
  • B31B2221/10 - the bags having no structural provision at the base for thickness of content
  • Y10S493/917 - Envelope

• US Classifications

  • 493 - Manufacturing container or tube from paper
  • 053 - Package making
  • 229 - Envelopes, wrappers, and paperboard boxes
  • 283 - Printed matter