3724901

Information

• Patent Grant
• 3724901

• References
• Source

• Patent Number

  3,724,901

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1973
  51 years ago

• CPC

  • E21C27/18 - by both slitting and planing
  • E21C27/26 - by closely adjacent cutter chains acting on the full working face

• US Classifications

  • 299 - Mining or in situ disintegration of hard material