3253947

Information

• Patent Grant
• 3253947

• References
• Source

• Patent Number

  3,253,947

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1966
  58 years ago

• CPC

  • E04B1/8409 - sheet-shaped
  • E04B2001/8461 - layered
  • Y10T442/25 - Coating or impregnation absorbs sound
  • Y10T442/2574 - Acid or alkali resistant
  • Y10T442/2639 - Coated or impregnated asbestos fabric

• US Classifications

  • 442 - Fabric
  • 181 - Acoustics