3217392

Information

• Patent Grant
• 3217392

• References
• Source

• Patent Number

  3,217,392

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1965
  59 years ago

• CPC

  • B23K1/0012 - Brazing heat exchangers
  • B21C37/22 - Making finned or ribbed tubes by fixing strip or like material to tubes
  • B21C37/26 - helically-ribbed tubes
  • B21D53/02 - heat exchangers or parts thereof
  • F28F1/122 - and being formed of wires
  • F28F1/36 - the means being helically wound fins or wire spirals
  • F28F1/405 - and being formed of wires
  • Y10T29/49362 - Tube wound about tube
  • Y10T29/49393 - with metallurgical bonding

• US Classifications

  • 029 - Metal working
  • 165 - Heat exchange
  • 219 - Electric heating
  • 228 - Metal fusion bonding
  • 392 - Electric resistance heating devices