3838886

Information

• Patent Grant
• 3838886

• References
• Source

• Patent Number

  3,838,886

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1974
  50 years ago

• CPC

  • E21C41/22 - for ores
  • E21C25/60 - Slitting by jets of water or other liquid
  • E21C35/20 - General features of equipment for removal of chippings
  • E21C37/00 - Other methods or devices for dislodging with or without loading
  • E21F13/04 - Transport of mined material in gravity inclines in staple or inclined shafts
  • E21F13/042 - Vertical hydraulic conveying of coal

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 060 - Power plants
  • 405 - Hydraulic and earth engineering