1669869

Information

• Patent Grant
• 1669869

• References
• Source

• Patent Number

  1,669,869

• Date Filed

  Not available

• Date Issued

  Tuesday, May 15, 1928
  96 years ago

• CPC

  • G03C11/18 - Colouring
  • Y10T428/24909 - Free metal or mineral containing

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof
  • 396 - Photography
  • 428 - Stock material or miscellaneous articles