2133620

Information

• Patent Grant
• 2133620

• References
• Source

• Patent Number

  2,133,620

• Date Filed

  Not available

• Date Issued

  Tuesday, October 18, 1938
  86 years ago

• CPC

  • B31C5/00 - Forming tubes or pipes of paper or cardboard without mandrels
  • B31F1/0061 - for making articles of indefinite length

• US Classifications

  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 174 - Electricity: conductors and insulators
  • 493 - Manufacturing container or tube from paper