2152693

Information

• Patent Grant
• 2152693

• References
• Source

• Patent Number

  2,152,693

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1939
  85 years ago

• CPC

  • C09B49/10 - from diphenylamines, indamines, or indophenols

• US Classifications

  • 552 - Organic compounds
  • 564 - Organic compounds