2172763

Information

• Patent Grant
• 2172763

• References
• Source

• Patent Number

  2,172,763

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • C09B1/346 - only sulfonated in a substituent

• US Classifications

  • 552 - Organic compounds