2305690

Information

• Patent Grant
• 2305690

• References
• Source

• Patent Number

  2,305,690

• Date Filed

  Not available

• Date Issued

  Tuesday, December 22, 1942
  82 years ago

• CPC

  • C09B1/5155 - only amino and hydroxy groups
  • C09B1/26 - Dyes with amino groups substituted by hydrocarbon radicals
  • C09B1/28 - substituted by alkyl, aralkyl or cyclo alkyl groups
  • C09B1/285 - Dyes with no other substituents than the amino groups
  • C09B1/325 - Dyes with no other substituents than the amino groups

• US Classifications

  • 552 - Organic compounds