3617093

Information

• Patent Grant
• 3617093

• References
• Source

• Patent Number

  3,617,093

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1971
  53 years ago

• CPC

  • E21C27/20 - Mineral freed by means not involving slitting
  • E21C27/38 - Machine stationary while planing in an arc

• US Classifications

  • 299 - Mining or in situ disintegration of hard material