3477525

Information

• Patent Grant
• 3477525

• References
• Source

• Patent Number

  3,477,525

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1969
  55 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
  • 102 - Ammunition and explosives