3803991

Information

• Patent Grant
• 3803991

• References
• Source

• Patent Number

  3,803,991

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  50 years ago

• CPC

  • B31B37/00 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents from webs
  • B31B2221/055 - Applying liners in already made bags

• US Classifications

  • 493 - Manufacturing container or tube from paper