3472611

Information

• Patent Grant
• 3472611

• References
• Source

• Patent Number

  3,472,611

• Date Filed

  Not available

• Date Issued

  Tuesday, October 14, 1969
  55 years ago

• CPC

  • B41M7/0063 - Preservation or restoration of currency, books or archival material
  • D21H17/07 - Nitrogen-containing compounds
  • D21H25/18 - of old paper as in books, documents

• US Classifications

  • 427 - Coating processes
  • 252 - Compositions
  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing