3812922

Information

• Patent Grant
• 3812922

• References
• Source

• Patent Number

  3,812,922

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1974
  50 years ago

• CPC

  • E21B25/18 - the core receiver being specially adapted for operation under water
  • B63C7/08 - using rigid floats
  • B63C11/34 - Diving chambers or underwater vessels
  • E02F3/8858 - Submerged units
  • E02F7/005 - conveying material from the underwater bottom
  • E21B7/124 - with underwater tool drive prime mover
  • E21B25/10 - Formed core retaining or severing means
  • E21C50/00 - Obtaining minerals from underwater, not otherwise provided for
  • B63G2008/004 - autonomously operating

• US Classifications

  • 175 - Boring or penetrating the earth
  • 037 - Excavating
  • 114 - Ships
  • 405 - Hydraulic and earth engineering