2671783

Information

• Patent Grant
• 2671783

• References
• Source

• Patent Number

  2,671,783

• Date Filed

  Not available

• Date Issued

  Tuesday, March 9, 1954
  70 years ago

• CPC

  • C07D231/06 - having one double bond between ring members or between ring members and non-ring members
  • C09B23/0075 - the polymethine chain being part of an heterocyclic ring
  • C09B23/107 - four >CH- groups
  • C09B23/141 - Bis styryl dyes containing two radicals C6H5-CH=CH-
  • C09B23/145 - the ethylene chain carrying an heterocyclic residue
  • G03C1/24 - Styryl dyes
  • G03C1/26 - Polymethine chain forming part of a heterocyclic ring

• US Classifications

  • 548 - Organic compounds
  • 430 - Radiation imagery chemistry: process, composition, or product thereof