3343250

Information

• Patent Grant
• 3343250

• References
• Source

• Patent Number

  3,343,250

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1967
  57 years ago

• CPC

  • F16L9/18 - Double-walled pipes Multi-channel pipes or pipe assemblies
  • B21C37/151 - Making tubes with multiple passages
  • B21D9/16 - Auxiliary equipment
  • Y10T29/49391 - Tube making or reforming
  • Y10T29/4981 - Utilizing transitory attached element or associated separate material
  • Y10T29/49879 - Spaced wall tube or receptacle

• US Classifications

  • 029 - Metal working
  • 072 - Metal deforming
  • 138 - Pipes and tubular conduits
  • 493 - Manufacturing container or tube from paper