3428520

Information

• Patent Grant
• 3428520

• References
• Source

• Patent Number

  3,428,520

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1969
  55 years ago

• CPC

  • D21C3/006 - with compounds not otherwise provided for
  • D21C11/0007 - Recovery of by-products

• US Classifications

  • 162 - Paper making and fiber liberation