3047712

Information

• Patent Grant
• 3047712

• References
• Source

• Patent Number

  3,047,712

• Date Filed

  Not available

• Date Issued

  Tuesday, July 31, 1962
  62 years ago

• CPC

  • B23K11/084 - of helicoïdal seams
  • B21C37/26 - helically-ribbed tubes
  • B23K11/082 - of three-dimensional seams
  • F28F1/36 - the means being helically wound fins or wire spirals
  • Y10T29/49382 - Helically finned

• US Classifications

  • 219 - Electric heating
  • 029 - Metal working
  • 165 - Heat exchange