2157351

Information

• Patent Grant
• 2157351

• References
• Source

• Patent Number

  2,157,351

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1939
  85 years ago

• CPC

  • G03C1/40 - Dyestuffs not covered by the groups G03C1/08 - G03C1/38 or G03C1/42
  • G03C1/102 - dyes other than methine dyes

• US Classifications

  • 540 - Organic compounds
  • 549 - Organic compounds