1877146

Information

• Patent Grant
• 1877146

• References
• Source

• Patent Number

  1,877,146

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1932
  92 years ago

• CPC

  • C09B1/262 - Dyes with no other substituents than the substituted amino groups
  • C07D515/22 - in which the condensed system contains four or more hetero rings
  • C09B1/264 - sulfonated

• US Classifications

  • 544 - Organic compounds