2193219

Information

• Patent Grant
• 2193219

• References
• Source

• Patent Number

  2,193,219

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1940
  85 years ago

• CPC

  • E21D1/12 - by freezing
  • C09K8/14 - Clay-containing compositions

• US Classifications

  • 175 - Boring or penetrating the earth
  • 405 - Hydraulic and earth engineering