2306572

Information

• Patent Grant
• 2306572

• References
• Source

• Patent Number

  2,306,572

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1942
  82 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