3775984

Information

• Patent Grant
• 3775984

• References
• Source

• Patent Number

  3,775,984

• Date Filed

  Not available

• Date Issued

  Tuesday, December 4, 1973
  51 years ago

• CPC

  • E21F16/00 - Drainage
  • E21C37/16 - by fire-setting or by similar methods based on a heat effect
  • E21C41/26 - Methods of surface mining Layouts therefor
  • E21C41/31 - for oil-bearing deposits
  • E21C41/32 - Reclamation of surface-mined areas

• US Classifications

  • 399 - Electrophotography
  • 102 - Ammunition and explosives
  • 299 - Mining or in situ disintegration of hard material
  • 405 - Hydraulic and earth engineering