3479090

Information

• Patent Grant
• 3479090

• References
• Source

• Patent Number

  3,479,090

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1969
  55 years ago

• CPC

  • E21C27/24 - by milling means acting on the full working face
  • E21C27/20 - Mineral freed by means not involving slitting

• US Classifications

  • 299 - Mining or in situ disintegration of hard material