2425468

Information

• Patent Grant
• 2425468

• References
• Source

• Patent Number

  2,425,468

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1947
  77 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
  • 092 - Expansible chamber devices