3661998

Information

• Patent Grant
• 3661998

• References
• Source

• Patent Number

  3,661,998

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1972
  52 years ago

• CPC

  • C07C49/477 - having two rings
  • C07C45/59 - in five-membered rings

• US Classifications

  • 568 - Organic compounds
  • 562 - Organic compounds