2639290

Information

• Patent Grant
• 2639290

• References
• Source

• Patent Number

  2,639,290

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1953
  71 years ago

• CPC

  • C09B59/00 - Artificial dyes of unknown constitution

• US Classifications

  • 556 - Organic compounds
  • 106 - Compositions: coating or plastic
  • 252 - Compositions
  • 359 - Optical: systems and elements