3253326

Information

• Patent Grant
• 3253326

• References
• Source

• Patent Number

  3,253,326

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1966
  58 years ago

• CPC

  • B21D7/00 - Bending rods, profiles, or tubes
  • B21C37/283 - Making U-pieces
  • Y10T29/49361 - Tube inside tube
  • Y10T29/49861 - Sizing mating parts during final positional association
  • Y10T29/49879 - Spaced wall tube or receptacle

• US Classifications

  • 029 - Metal working
  • 138 - Pipes and tubular conduits
  • 165 - Heat exchange