3923109

Information

• Patent Grant
• 3923109

• References
• Source

• Patent Number

  3,923,109

• Date Filed

  Not available

• Date Issued

  Tuesday, December 2, 1975
  49 years ago

• CPC

  • E21B10/52 - with chisel or button type inserts
  • E21B10/083 - with longitudinal axis
  • E21B10/18 - characterised by conduits or nozzles for drilling fluids

• US Classifications

  • 175 - Boring or penetrating the earth