3724538

Information

• Patent Grant
• 3724538

• References
• Source

• Patent Number

  3,724,538

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1973
  51 years ago

• CPC

  • F28F1/128 - Fins with openings
  • B21D13/04 - by rolling
  • B21D53/025 - Louvered fins
  • B21D53/08 - of both metal tubes and sheet metal
  • Y10T428/12368 - Struck-out portion type
  • Y10T428/1241 - Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]

• US Classifications

  • 165 - Heat exchange
  • 072 - Metal deforming
  • 428 - Stock material or miscellaneous articles