2977918

Information

• Patent Grant
• 2977918

• References
• Source

• Patent Number

  2,977,918

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  63 years ago

• CPC

  • B21C37/24 - annularly-ribbed tubes
  • Y10T29/49375 - including conduit expansion or inflation
  • Y10T29/4938 - Common fin traverses plurality of tubes

• US Classifications

  • 029 - Metal working
  • 165 - Heat exchange