3012884

Information

• Patent Grant
• 3012884

• References
• Source

• Patent Number

  3,012,884

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1961
  63 years ago

• CPC

  • C07D231/50 - Acylated on said nitrogen atom
  • C07D231/22 - with aryl radicals attached to ring nitrogen atoms
  • C07D231/26 - 1-Phenyl-3-methyl-5- pyrazolones, unsubstituted or substituted on the phenyl ring
  • C07D231/46 - Oxygen atom in position 3 or 5 and nitrogen atom in position 4
  • C07D231/48 - with hydrocarbon radicals attached to said nitrogen atom
  • C07D231/52 - Oxygen atom in position 3 and nitrogen atom in position 5, or vice-versa
  • G03C7/18 - Processes for the correction of the colour image in subtractive colour photography
  • G03C7/344 - Naphtholic couplers

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof