3857416

Information

• Patent Grant
• 3857416

• References
• Source

• Patent Number

  3,857,416

• Date Filed

  Not available

• Date Issued

  Tuesday, December 31, 1974
  50 years ago

• CPC

  • E04C5/0613 - Closed cages made of one single bent reinforcement mat
  • E04C5/0627 - Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
  • F16L9/08 - of concrete, cement, or asbestos cement, with or without reinforcement

• US Classifications

  • 138 - Pipes and tubular conduits