3425453

Information

• Patent Grant
• 3425453

• References
• Source

• Patent Number

  3,425,453

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1969
  55 years ago

• CPC

  • F16L9/18 - Double-walled pipes Multi-channel pipes or pipe assemblies
  • F16L11/133 - buoyant
  • F17D3/08 - the different products being separated by "go-devils"

• US Classifications

  • 138 - Pipes and tubular conduits
  • 037 - Excavating
  • 405 - Hydraulic and earth engineering