2346677

Information

• Patent Grant
• 2346677

• References
• Source

• Patent Number

  2,346,677

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1944
  80 years ago

• CPC

  • E21C37/08 - Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 254 - Implements or apparatus for applying pushing or pulling force