3750407

Information

• Patent Grant
• 3750407

• References
• Source

• Patent Number

  3,750,407

• Date Filed

  Not available

• Date Issued

  Tuesday, August 7, 1973
  51 years ago

• CPC

  • E21D11/157 - Laggings making use of fluid cushions
  • E21D11/00 - Lining tunnels, galleries or other underground cavities
  • E21D11/10 - with concrete cast in situ Shuttering also lost shutterings

• US Classifications

  • 405 - Hydraulic and earth engineering