2721581

Information

• Patent Grant
• 2721581

• References
• Source

• Patent Number

  2,721,581

• Date Filed

  Not available

• Date Issued

  Tuesday, October 25, 1955
  69 years ago

• CPC

  • F16L21/045 - the members passing through the sealing rings

• US Classifications

  • 138 - Pipes and tubular conduits
  • 219 - Electric heating
  • 285 - Pipe joints or couplings