3840640

Information

• Patent Grant
• 3840640

• References
• Source

• Patent Number

  3,840,640

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • C01F11/46 - Sulfates
  • C01B25/22 - Preparation by reacting phosphate-containing material with an acid
  • C01D9/04 - Preparation with liquid nitric acid

• US Classifications

  • 423 - Chemistry of inorganic compounds