1581618

Information

• Patent Grant
• 1581618

• References
• Source

• Patent Number

  1,581,618

• Date Filed

  Not available

• Date Issued

  Tuesday, April 20, 1926
  98 years ago

• CPC

  • D21H13/42 - Asbestos
  • D21H5/16 - Tobacco or cigarette paper
  • D21H5/183 - of asbestos fibres
  • D21H17/68 - siliceous

• US Classifications

  • 162 - Paper making and fiber liberation