2931187

Information

• Patent Grant
• 2931187

• References
• Source

• Patent Number

  2,931,187

• Date Filed

  Not available

• Date Issued

  Tuesday, April 5, 1960
  64 years ago

• CPC

  • E21D1/14 - Freezing apparatus
  • E02D5/32 - with arrangements for setting or assisting in setting in position by fluid jets
  • E02D19/04 - by coffer-dams
  • E21D1/08 - while moving the lining downwards

• US Classifications

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