3657213

Information

• Patent Grant
• 3657213

• References
• Source

• Patent Number

  3,657,213

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1972
  52 years ago

• CPC

  • C09B23/143 - the ethylene chain carrying a COOH or a functionally modified derivative, e.g.-CN, -COR, -COOR, -CON=, C6H5-CH=C-CN
  • C09B1/002 - containing onium groups
  • C09B1/501 - containing onium groups
  • C09B11/10 - Amino derivatives of triarylmethanes
  • C09B44/02 - containing ammonium groups not directly attached to an azo group
  • C09B51/00 - Nitro or nitroso dyes
  • C09B55/00 - Azomethine dyes
  • C09B57/00 - Other synthetic dyes of known constitution
  • C09B69/00 - Dyes not provided for by a single group of this subclass
  • C09B69/001 - Dyes containing an onium group attached to the dye skeleton via a bridge

• US Classifications

  • 534 - Organic compounds
  • 546 - Organic compounds
  • 552 - Organic compounds
  • 564 - Organic compounds