3707846

Information

• Patent Grant
• 3707846

• References
• Source

• Patent Number

  3,707,846

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1973
  51 years ago

• CPC

  • E21D5/10 - in the form of tubbing or of rings composed of profile elements
  • E21D11/15 - Plate linings Laggings

• US Classifications

  • 405 - Hydraulic and earth engineering