2312874

Information

• Patent Grant
• 2312874

• References
• Source

• Patent Number

  2,312,874

• Date Filed

  Not available

• Date Issued

  Tuesday, March 2, 1943
  82 years ago

• CPC

  • G03C5/46 - Toning

• US Classifications

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