3665719

Information

• Patent Grant
• 3665719

• References
• Source

• Patent Number

  3,665,719

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1972
  52 years ago

• CPC

  • E21D11/006 - Lining anchored in the rock
  • E21D21/0073 - Anchoring-bolts having an inflatable sleeve

• US Classifications

  • 405 - Hydraulic and earth engineering