3684021

Information

• Patent Grant
• 3684021

• References
• Source

• Patent Number

  3,684,021

• Date Filed

  Not available

• Date Issued

  Tuesday, August 15, 1972
  52 years ago

• CPC

  • A62C3/0271 - Detection of area conflagration fires
  • A62C3/02 - for area conflagrations
  • E21F5/14 - Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions

• US Classifications

  • 169 - Fire extinguishers
  • 299 - Mining or in situ disintegration of hard material