3840639

Information

• Patent Grant
• 3840639

• References
• Source

• Patent Number

  3,840,639

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • C01B25/234 - Purification Stabilisation Concentration
  • C01B25/185 - Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid
  • C05B11/08 - using sulfuric acid

• US Classifications

  • 423 - Chemistry of inorganic compounds