3738253

Information

• Patent Grant
• 3738253

• References
• Source

• Patent Number

  3,738,253

• Date Filed

  Not available

• Date Issued

  Tuesday, June 12, 1973
  51 years ago

• CPC

  • F24F7/02 - Roof ventilation
  • E04D13/0352 - the parts being of domed or pyramidal shape
  • E05F1/1075 - for counterbalancing
  • E05Y2900/154 - Skylights
  • F24F2011/0097 - opening air passage in case of fire, excessive heat or smoke
  • Y10T137/1797 - Heat destructible or fusible

• US Classifications

  • 454 - Ventilation
  • 049 - Movable or removable closures
  • 137 - Fluid handling