1581619

Information

• Patent Grant
• 1581619

• References
• Source

• Patent Number

  1,581,619

• Date Filed

  Not available

• Date Issued

  Tuesday, April 20, 1926
  98 years ago

• CPC

  • D21H21/34 - Ignifugeants
  • D21H5/0002 - Flame-resistant papers; (complex) compositions rendering paper fire-resistant
  • D21H5/16 - Tobacco or cigarette paper
  • D21H5/183 - of asbestos fibres
  • D21H13/42 - Asbestos
  • D21H17/68 - siliceous

• US Classifications

  • 162 - Paper making and fiber liberation
  • 131 - Tobacco