3313357

Information

• Patent Grant
• 3313357

• References
• Source

• Patent Number

  3,313,357

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1967
  57 years ago

• CPC

  • E21B25/18 - the core receiver being specially adapted for operation under water
  • E21B7/1245 - using explosive means

• US Classifications

  • 175 - Boring or penetrating the earth