3386527

Information

• Patent Grant
• 3386527

• References
• Source

• Patent Number

  3,386,527

• Date Filed

  Not available

• Date Issued

  Tuesday, June 4, 1968
  56 years ago

• CPC

  • E04B1/82 - specifically with respect to sound only
  • E04B1/8409 - sheet-shaped
  • G10K11/168 - Plural layers of different materials
  • A47L15/4255 - Insulation arrangements
  • E04B2001/8466 - with an intermediate layer formed of lines or dots of elastic material
  • Y10S428/906 - Roll or coil
  • Y10T428/24479 - including variation in thickness
  • Y10T428/24967 - Absolute thicknesses specified
  • Y10T428/2848 - Three or more layers

• US Classifications

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