3400641

Information

• Patent Grant
• 3400641

• References
• Source

• Patent Number

  3,400,641

• Date Filed

  Not available

• Date Issued

  Tuesday, September 10, 1968
  56 years ago

• CPC

  • B31B21/00 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from sheets or blanks
  • B31B1/82 - Attaching windows
  • B31B2201/9076 - Forming or attaching windows
  • B31B2219/9045 - involving applying window patches
  • B31B2221/10 - the bags having no structural provision at the base for thickness of content

• US Classifications

  • 493 - Manufacturing container or tube from paper