3861425

Information

• Patent Grant
• 3861425

• References
• Source

• Patent Number

  3,861,425

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1975
  50 years ago

• CPC

  • F16L57/04 - against fire or other external sources of extreme heat
  • F24F13/02 - Ducting arrangements
  • F24F2221/30 - comprising fireproof material
  • Y10S138/02 - Glass fiber
  • Y10S428/921 - Fire or flameproofing
  • Y10T428/31645 - Next to addition polymer from unsaturated monomers

• US Classifications

  • 138 - Pipes and tubular conduits
  • 428 - Stock material or miscellaneous articles
  • 524 - Synthetic resins or natural rubbers