3756346

Information

• Patent Grant
• 3756346

• References
• Source

• Patent Number

  3,756,346

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1973
  51 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E04B2001/8423 - Tray or frame type panels or blocks, with or without acoustical filling
  • E04B2001/8476 - with acoustical cavities, with or without acoustical filling
  • Y10T428/24182 - Inward from edge of web or sheet
  • Y10T428/30 - Self-sustaining carbon mass or layer with impregnant or other layer

• US Classifications

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