3339981

Information

• Patent Grant
• 3339981

• References
• Source

• Patent Number

  3,339,981

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1967
  57 years ago

• CPC

  • E21C27/18 - by both slitting and planing
  • E21C35/12 - along a conveyor for the cut mineral

• US Classifications

  • 299 - Mining or in situ disintegration of hard material