3689522

Information

• Patent Grant
• 3689522

• References
• Source

• Patent Number

  3,689,522

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • C07D213/80 - in position 3
  • C07C205/56 - having nitro groups bound to carbon atoms of six-membered aromatic rings and carboxyl groups bound to acyclic carbon atoms of the carbon skeleton
  • C07C317/00 - Sulfones Sulfoxides
  • C07C323/00 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
  • C07D215/12 - with substituted hydrocarbon radicals attached to ring carbon atoms
  • C09B43/00 - Preparation of azo dyes from other azo compounds
  • C09B43/30 - by esterification of -COOH or -SO3H groups
  • C07C2103/24 - (Hydrogenated) anthracenes
  • C07C2103/26 - (Hydrogenated) phenanthrenes

• US Classifications

  • 560 - Organic compounds