3699872

Information

• Patent Grant
• 3699872

• References
• Source

• Patent Number

  3,699,872

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1972
  52 years ago

• CPC

  • F24F13/10 - movable
  • F24F13/0263 - Insulation for air ducts
  • F24F13/072 - of elongated shape
  • E04B2009/026 - the supporting ceiling grid acting as air diffusers

• US Classifications

  • 454 - Ventilation
  • 239 - Fluid sprinkling, spraying, and diffusing
  • 251 - Valves and valve actuation