2177668

Information

• Patent Grant
• 2177668

• References
• Source

• Patent Number

  2,177,668

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1939
  85 years ago

• CPC

  • C04B11/007 - After-treatment of the dehydration products

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 023 - Chemistry: physical processes