2268260

Information

• Patent Grant
• 2268260

• References
• Source

• Patent Number

  2,268,260

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1941
  83 years ago

• CPC

  • E21C25/50 - with equipment for cleaning the slit

• US Classifications

  • 299 - Mining or in situ disintegration of hard material