2198686

Information

• Patent Grant
• 2198686

• References
• Source

• Patent Number

  2,198,686

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1940
  84 years ago

• CPC

  • C01B17/94 - Recovery from nitration acids

• US Classifications

  • 423 - Chemistry of inorganic compounds