3815214

Information

• Patent Grant
• 3815214

• References
• Source

• Patent Number

  3,815,214

• Date Filed

  Not available

• Date Issued

  Tuesday, June 11, 1974
  50 years ago

• CPC

  • E03F5/021 - Connection of sewer pipes to manhole shaft
  • B28B7/168 - for holders or similar hollow articles
  • B28B23/0043 - with gaskets or sealing elements
  • E03F5/02 - Manhole shafts or other inspection chambers snow-filling openings accessories
  • F16L41/002 - of concrete, cement or asbestos-cement
  • Y10T29/4987 - Elastic joining of parts

• US Classifications

  • 029 - Metal working
  • 249 - Static molds
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 285 - Pipe joints or couplings
  • 405 - Hydraulic and earth engineering