2821900

Information

• Patent Grant
• 2821900

• References
• Source

• Patent Number

  2,821,900

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1958
  66 years ago

• CPC

  • E04D13/1476 - wherein the parts extending above the roof have a generally circular cross-section
  • E04D13/1475 - wherein the parts extending above the roof have a generally rectangular cross-section
  • E04F17/026 - Exterior cladding

• US Classifications

  • 454 - Ventilation
  • 138 - Pipes and tubular conduits
  • 285 - Pipe joints or couplings