2891971

Information

• Patent Grant
• 2891971

• References
• Source

• Patent Number

  2,891,971

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1959
  65 years ago

• CPC

  • C09B63/00 - Lakes
  • C09B1/201 - Dyes with no other substituents than the amino groups
  • C09B1/26 - Dyes with amino groups substituted by hydrocarbon radicals

• US Classifications

  • 552 - Organic compounds
  • 544 - Organic compounds