3804941

Information

• Patent Grant
• 3804941

• References
• Source

• Patent Number

  3,804,941

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  50 years ago

• CPC

  • C22B34/36 - Obtaining tungsten
  • C01G41/00 - Compounds of tungsten
  • C22B3/0012 - using aliphatic amines
  • C22B3/0016 - using quaternary ammonium
  • C22B3/0041 - using organo-metallic compounds of a single type
  • C22B3/0055 - of the phosphonium (PR4) type
  • C22B3/0071 - Dinuclear or polynuclear oxyacids and their derivatives
  • Y02P10/234 - by hydro metallurgy

• US Classifications

  • 423 - Chemistry of inorganic compounds