3924895

Information

• Patent Grant
• 3924895

• References
• Source

• Patent Number

  3,924,895

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1975
  49 years ago

• CPC

  • E21F13/042 - Vertical hydraulic conveying of coal
  • E21C35/20 - General features of equipment for removal of chippings

• US Classifications

  • 299 - Mining or in situ disintegration of hard material