3688870

Information

• Patent Grant
• 3688870

• References
• Source

• Patent Number

  3,688,870

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  53 years ago

• CPC

  • F01N1/10 - in combination with sound-absorbing materials
  • F01N2450/16 - by using threaded joints
  • F01N2450/24 - by bolts, screws, rivets or the like
  • F01N2470/02 - Tubes being perforated
  • F01N2470/18 - the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
  • F01N2470/24 - Concentric tubes or tubes being concentric to housing

• US Classifications

  • 181 - Acoustics