3814208

Information

• Patent Grant
• 3814208

• References
• Source

• Patent Number

  3,814,208

• Date Filed

  Not available

• Date Issued

  Tuesday, June 4, 1974
  50 years ago

• CPC

  • E04C2/322 - with parallel corrugations
  • E04B1/86 - slab-shaped
  • E04B9/04 - comprising slabs, panels, sheets or the like
  • E04C2/326 - with corrugations, incisions or reliefs in more than one direction of the element
  • F24F13/068 - formed as perforated walls, ceilings or floors
  • E04B2001/8414 - with non-planar face
  • E04B2001/849 - Groove or slot type openings
  • E04B2001/8495 - the openings going through from one face to the other face of the element
  • Y10T428/24281 - Struck out portion type

• US Classifications

  • 181 - Acoustics
  • 428 - Stock material or miscellaneous articles