3516503

Information

• Patent Grant
• 3516503

• References
• Source

• Patent Number

  3,516,503

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1970
  54 years ago

• CPC

  • E21B25/18 - the core receiver being specially adapted for operation under water
  • E21B7/124 - with underwater tool drive prime mover
  • Y10S173/01 - Operable submerged in liquid

• US Classifications

  • 175 - Boring or penetrating the earth
  • 173 - Tool driving or impacting