3769146

Information

• Patent Grant
• 3769146

• References
• Source

• Patent Number

  3,769,146

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1973
  51 years ago

• CPC

  • E04B1/946 - Protection against smoke or toxic gases
  • Y10T428/265 - 1 mil or less
  • Y10T428/266 - of base or substrate
  • Y10T428/31659 - With cellulosic layer
  • Y10T428/31721 - Of polyimide
  • Y10T442/656 - Preformed metallic film or foil or sheet [film or foil or sheet had structural integrity prior to association with the nonwoven fabric]

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 442 - Fabric