3644270

Information

• Patent Grant
• 3644270

• References
• Source

• Patent Number

  3,644,270

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1972
  52 years ago

• CPC

  • C09B17/04 - of the naphthalene series
  • C08K5/0041 - Optical brightening agents, organic pigments
  • C09B11/24 - Phthaleins containing amino groups; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having heterocyclic aryl rings; Lactone or lactame forms of triarylmethane dyes

• US Classifications

  • 524 - Synthetic resins or natural rubbers