2420721

Information

• Patent Grant
• 2420721

• References
• Source

• Patent Number

  2,420,721

• Date Filed

  Not available

• Date Issued

  Tuesday, May 20, 1947
  77 years ago

• CPC

  • F28F9/10 - by screw-type connections

• US Classifications

  • 277 - Seal for a joint or juncture
  • 285 - Pipe joints or couplings