3903423

Information

• Patent Grant
• 3903423

• References
• Source

• Patent Number

  3,903,423

• Date Filed

  Not available

• Date Issued

  Tuesday, September 2, 1975
  49 years ago

• CPC

  • C07D263/52 - condensed with carbocyclic rings or ring systems
  • A61B5/0059 - using light
  • A61B5/445 - Evaluating skin irritation or skin trauma
  • G01J1/48 - using chemical effects
  • G01J1/50 - using change in colour of an indicator
  • G01N31/22 - using chemical indicators
  • C07C2103/18 - (Hydrogenated) fluorenes

• US Classifications

  • 250 - Radiant energy