3498987

Information

• Patent Grant
• 3498987

• References
• Source

• Patent Number

  3,498,987

• Date Filed

  Not available

• Date Issued

  Tuesday, March 3, 1970
  54 years ago

• CPC

  • C07D221/20 - Spiro-condensed ring systems
  • A61K31/00 - Medicinal preparations containing organic active ingredients
  • C07D219/02 - with only hydrogen, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
  • C07D219/14 - with hydrocarbon radicals, substituted by nitrogen atoms, attached to the ring nitrogen atom
  • C07D219/16 - with acyl radicals, substituted by nitrogen atoms, attached to the ring nitrogen atom

• US Classifications

  • 546 - Organic compounds