2021680

Information

• Patent Grant
• 2021680

• References
• Source

• Patent Number

  2,021,680

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1935
  89 years ago

• CPC

  • C07D319/06 - not condensed with other rings
  • C07C41/50 - by reactions producing groups
  • C07D317/10 - not condensed with other rings

• US Classifications

  • 549 - Organic compounds
  • 568 - Organic compounds