3273297

Information

• Patent Grant
• 3273297

• References
• Source

• Patent Number

  3,273,297

• Date Filed

  Not available

• Date Issued

  Tuesday, September 20, 1966
  58 years ago

• CPC

  • E06B3/827 - of metal without an internal frame
  • E06B3/7015 - characterised by the filling between two external panels
  • E06B5/20 - for insulation against noise
  • E04B2001/8423 - Tray or frame type panels or blocks, with or without acoustical filling
  • E04B2001/8452 - with peripheral frame members
  • E06B2003/703 - containing a metallic layer
  • E06B2003/7032 - of non-vegetal fibrous material

• US Classifications

  • 052 - Static structures
  • 181 - Acoustics