3209440

Information

• Patent Grant
• 3209440

• References
• Source

• Patent Number

  3,209,440

• Date Filed

  Not available

• Date Issued

  Tuesday, October 5, 1965
  59 years ago

• CPC

  • F28F1/28 - the element being built-up from finned sections
  • B21D53/085 - with fins places on zig-zag tubes or parallel tubes
  • Y10T29/49361 - Tube inside tube
  • Y10T29/49366 - Sheet joined to sheet
  • Y10T29/4938 - Common fin traverses plurality of tubes

• US Classifications

  • 029 - Metal working
  • 165 - Heat exchange