2272557

Information

• Patent Grant
• 2272557

• References
• Source

• Patent Number

  2,272,557

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1942
  83 years ago

• CPC

  • G03C5/46 - Toning
  • G03C1/64 - Compositions containing iron compounds as photosensitive substances

• US Classifications

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