3643701

Information

• Patent Grant
• 3643701

• References
• Source

• Patent Number

  3,643,701

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1972
  52 years ago

• CPC

  • F28F11/04 - using pairs of obturating elements
  • Y10T29/49734 - and removing damaged material

• US Classifications

  • 138 - Pipes and tubular conduits
  • 029 - Metal working
  • 165 - Heat exchange
  • 285 - Pipe joints or couplings