3721823

Information

• Patent Grant
• 3721823

• References
• Source

• Patent Number

  3,721,823

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  51 years ago

• CPC

  • G03C8/045 - with the formation of a subtractive dye image
  • G03C1/46 - having more than one photosensitive layer
  • G03C1/48538 - non-prefogged
  • G03C5/16 - X-ray, infra-red, or ultra-violet ray processes
  • G03C7/18 - Processes for the correction of the colour image in subtractive colour photography
  • G03C7/28 - Silver dye bleach processes Materials therefor Preparing or processing such materials
  • G03C7/3335 - containing an azo chromophore
  • G03C7/346 - Phenolic couplers
  • G03C8/16 - initially diffusible in alkaline environment

• US Classifications

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