3521644

Information

• Patent Grant
• 3521644

• References
• Source

• Patent Number

  3,521,644

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1970
  54 years ago

• CPC

  • F16L25/0036 - Joints for corrugated pipes
  • E04B5/04 - with beams or slabs of concrete or other stone-like material
  • E04C5/122 - the tensile members are anchored by wedge-action
  • F16L13/113 - for concrete pipes

• US Classifications

  • 138 - Pipes and tubular conduits
  • 052 - Static structures