2780000

Information

• Patent Grant
• 2780000

• References
• Source

• Patent Number

  2,780,000

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1957
  68 years ago

• CPC

  • F28F1/006 - with variable shape
  • B21C37/283 - Making U-pieces
  • F28F9/26 - Arrangements for connecting different sections of heat-exchange elements
  • Y10T29/49444 - Elbow or L-shaped fitting making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working