1556973

Information

• Patent Grant
• 1556973

• References
• Source

• Patent Number

  1,556,973

• Date Filed

  Not available

• Date Issued

  Tuesday, October 13, 1925
  99 years ago

• CPC

  • D21H13/42 - Asbestos
  • D21H5/183 - of asbestos fibres

• US Classifications

  • 162 - Paper making and fiber liberation