3097494

Information

• Patent Grant
• 3097494

• References
• Source

• Patent Number

  3,097,494

• Date Filed

  Not available

• Date Issued

  Tuesday, July 16, 1963
  61 years ago

• CPC

  • E21D19/04 - for use in drifting galleries
  • E21D11/10 - with concrete cast in situ Shuttering also lost shutterings
  • E21D11/15 - Plate linings Laggings
  • E21D11/20 - Special cross- sections

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 052 - Static structures