2028141

Information

• Patent Grant
• 2028141

• References
• Source

• Patent Number

  2,028,141

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1936
  89 years ago

• CPC

  • C09B23/145 - the ethylene chain carrying an heterocyclic residue
  • C09B1/205 - Dyes with an unsaturated C on the N atom attached to the nucleus
  • C09B23/0091 - having only one heterocyclic ring at one end of the methine chain
  • C09B23/04 - one >CH- group
  • C09B23/141 - Bis styryl dyes containing two radicals C6H5-CH=CH-
  • C09B23/143 - the ethylene chain carrying a COOH or a functionally modified derivative, e.g.-CN, -COR, -COOR, -CON=, C6H5-CH=C-CN
  • C09B23/164 - containing one nitrogen atom

• US Classifications

  • 008 - Bleaching and dyeing
  • 548 - Organic compounds
  • 558 - Organic compounds
  • 564 - Organic compounds