3835937

Information

• Patent Grant
• 3835937

• References
• Source

• Patent Number

  3,835,937

• Date Filed

  Not available

• Date Issued

  Tuesday, September 17, 1974
  50 years ago

• CPC

  • E21B7/14 - Drilling by use of heat
  • E21B7/124 - with underwater tool drive prime mover
  • E21B7/143 - underwater

• US Classifications

  • 175 - Boring or penetrating the earth