3486572

Information

• Patent Grant
• 3486572

• References
• Source

• Patent Number

  3,486,572

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1969
  55 years ago

• CPC

  • E21B15/006 - Means for anchoring the drilling machine to the ground
  • E21B7/28 - Enlarging drilled holes
  • E21D9/115 - with cutting tools mounted pivotably or slidable on the head

• US Classifications

  • 175 - Boring or penetrating the earth
  • 299 - Mining or in situ disintegration of hard material