3434502

Information

• Patent Grant
• 3434502

• References
• Source

• Patent Number

  3,434,502

• Date Filed

  Not available

• Date Issued

  Tuesday, March 25, 1969
  56 years ago

• CPC

  • F24F13/0218 - Flexible soft ducts
  • F16L59/02 - Shape or form of insulating materials, with or without coverings integral with the insulating materials
  • F16L59/145 - providing fire-resistance
  • F24F13/0245 - Manufacturing or assembly of air ducts; Methods therefor
  • F24F2221/30 - comprising fireproof material
  • Y10T29/49828 - Progressively advancing of work assembly station or assembled portion of work
  • Y10T29/49885 - with coating before or during assembling
  • Y10T29/49888 - Subsequently coating

• US Classifications

  • 138 - Pipes and tubular conduits
  • 029 - Metal working
  • 139 - Textiles: weaving
  • 392 - Electric resistance heating devices