3305009

Information

• Patent Grant
• 3305009

• References
• Source

• Patent Number

  3,305,009

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1967
  57 years ago

• CPC

  • F28F1/325 - Fins with openings
  • B21D53/085 - with fins places on zig-zag tubes or parallel tubes
  • F28F1/32 - the means having portions engaging further tubular elements
  • Y10S165/502 - Lanced
  • Y10T29/49373 - Tube joint and tube plate structure

• US Classifications

  • 165 - Heat exchange
  • 029 - Metal working