3550841

Information

• Patent Grant
• 3550841

• References
• Source

• Patent Number

  3,550,841

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1970
  54 years ago

• CPC

  • B65D27/04 - with apertures or windows for viewing contents
  • 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
  • B65D27/08 - with two or more compartments
  • B31B2219/9045 - involving applying window patches
  • B31B2221/102 - obtained from essentially rectangular sheets

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes