2211243

Information

• Patent Grant
• 2211243

• References
• Source

• Patent Number

  2,211,243

• Date Filed

  Not available

• Date Issued

  Tuesday, August 13, 1940
  84 years ago

• CPC

  • E21C37/10 - Devices with expanding elastic casings

• US Classifications

  • 299 - Mining or in situ disintegration of hard material