3429390

Information

• Patent Grant
• 3429390

• References
• Source

• Patent Number

  3,429,390

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1969
  56 years ago

• CPC

  • E21B17/1092 - Gauge section of drill bits
  • E21B6/00 - Drives for combined percussion and rotary drilling
  • E21B10/083 - with longitudinal axis
  • E21B10/18 - characterised by conduits or nozzles for drilling fluids
  • E21B10/22 - characterised by bearing, lubrication or sealing details
  • E21B10/56 - Button type inserts

• US Classifications

  • 175 - Boring or penetrating the earth