3740958

Information

• Patent Grant
• 3740958

• References
• Source

• Patent Number

  3,740,958

• Date Filed

  Not available

• Date Issued

  Tuesday, June 26, 1973
  52 years ago

• CPC

  • B29C47/00 - Extrusion moulding
  • B29C47/023 - Coating the inner and outer surfaces of hollow reinforcement
  • F16L1/18 - the pipes being S- or J-shaped and under tension during laying
  • F16L1/206 - Apparatus for forming or coating the pipes
  • F16L9/12 - of plastics with or without reinforcement
  • F16L9/121 - with three layers
  • F16L9/133 - the walls consisting of two layers
  • B29C47/0023 - Hollow rigid articles having only one tubular passage

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 138 - Pipes and tubular conduits
  • 156 - Adhesive bonding and miscellaneous chemical manufacture