3891644

Information

• Patent Grant
• 3891644

• References
• Source

• Patent Number

  3,891,644

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  49 years ago

• CPC

  • C07D487/04 - Ortho-condensed systems
  • C07D209/38 - in position 2 and 3
  • C07D233/04 - having one double bond between ring members or between a ring member and a non-ring member
  • C07D233/20 - with substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D233/22 - Radicals substituted by oxygen atoms

• US Classifications

  • 544 - Organic compounds