3718960

Information

• Patent Grant
• 3718960

• References
• Source

• Patent Number

  3,718,960

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1973
  52 years ago

• CPC

  • B21C37/26 - helically-ribbed tubes
  • B21C37/24 - annularly-ribbed tubes
  • Y10T29/49382 - Helically finned
  • Y10T29/5142 - and means to sever work from supply
  • Y10T29/53113 - Heat exchanger

• US Classifications

  • 029 - Metal working