3842918

Information

• Patent Grant
• 3842918

• References
• Source

• Patent Number

  3,842,918

• Date Filed

  Not available

• Date Issued

  Tuesday, October 22, 1974
  50 years ago

• CPC

  • E21B49/04 - using explosives in boreholes using projectiles penetrating the wall

• US Classifications

  • 175 - Boring or penetrating the earth