3305267

Information

• Patent Grant
• 3305267

• References
• Source

• Patent Number

  3,305,267

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1967
  58 years ago

• CPC

  • E21F13/068 - Special adaptations for use at the junction of the working face with the gallery
  • E21C29/00 - Propulsion of machines for slitting or completely freeing the mineral from the seam
  • E21C29/14 - by haulage cable or chain pulling the machine along the working face

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 198 - Conveyors: power-driven
  • 222 - Dispensing