2521888

Information

• Patent Grant
• 2521888

• References
• Source

• Patent Number

  2,521,888

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1950
  74 years ago

• CPC

  • E21F5/10 - Devices for rock dusting

• US Classifications

  • 239 - Fluid sprinkling, spraying, and diffusing
  • 169 - Fire extinguishers
  • 299 - Mining or in situ disintegration of hard material