3639953

Information

• Patent Grant
• 3639953

• References
• Source

• Patent Number

  3,639,953

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  52 years ago

• CPC

  • D01F8/04 - from synthetic polymers
  • D01F9/145 - from pitch or distillation residues
  • D01F9/21 - from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D01F9/22 - from polyacrylonitriles
  • D01F9/245 - from polyurethanes
  • D01F9/26 - from polyesters
  • D01F9/28 - from polyamides
  • D01F9/322 - for manufacturing filaments from pitch
  • Y10T428/29 - Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 008 - Bleaching and dyeing
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 428 - Stock material or miscellaneous articles