1379155

Information

• Patent Grant
• 1379155

• References
• Source

• Patent Number

  1,379,155

• Date Filed

  Not available

• Date Issued

  Tuesday, May 24, 1921
  103 years ago

• CPC

  • D21H5/1281 - by chemical treatment
  • D21H17/67 - Water-insoluble compounds
  • D21H25/02 - Chemical or biochemical treatment

• US Classifications

  • 162 - Paper making and fiber liberation
  • 008 - Bleaching and dyeing