2172415

Information

• Patent Grant
• 2172415

• References
• Source

• Patent Number

  2,172,415

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • C07C37/007 - from the tar industry

• US Classifications

  • 568 - Organic compounds
  • 204 - Chemistry: electrical and wave energy