3055647

Information

• Patent Grant
• 3055647

• References
• Source

• Patent Number

  3,055,647

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1962
  62 years ago

• CPC

  • E21C3/24 - directly by air, steam, or gas pressure

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 060 - Power plants
  • 165 - Heat exchange
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth