3691008

Information

• Patent Grant
• 3691008

• References
• Source

• Patent Number

  3,691,008

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

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

• US Classifications

  • 162 - Paper making and fiber liberation