3785920

Information

• Patent Grant
• 3785920

• References
• Source

• Patent Number

  3,785,920

• Date Filed

  Not available

• Date Issued

  Tuesday, January 15, 1974
  50 years ago

• CPC

  • D21C3/263 - at least one stage being in presence of oxygen

• US Classifications

  • 162 - Paper making and fiber liberation