3336337

Information

• Patent Grant
• 3336337

• References
• Source

• Patent Number

  3,336,337

• Date Filed

  Not available

• Date Issued

  Tuesday, August 15, 1967
  57 years ago

• CPC

  • G09B3/04 - of chart form
  • B41M5/136 - Organic colour formers
  • C07D493/04 - Ortho-condensed systems
  • C09B11/24 - Phthaleins containing amino groups; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having heterocyclic aryl rings; Lactone or lactame forms of triarylmethane dyes
  • Y10S204/901 - Effecting a color change by wave energy

• US Classifications

  • 549 - Organic compounds
  • 089 - Ordnance
  • 101 - Printing
  • 204 - Chemistry: electrical and wave energy
  • 503 - Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor
  • 546 - Organic compounds
  • 562 - Organic compounds