3221505

Information

• Patent Grant
• 3221505

• References
• Source

• Patent Number

  3,221,505

• Date Filed

  Not available

• Date Issued

  Tuesday, December 7, 1965
  59 years ago

• CPC

  • E21D1/16 - by petrification
  • E02D19/20 - by displacing the water

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 166 - Wells