2231201

Information

• Patent Grant
• 2231201

• References
• Source

• Patent Number

  2,231,201

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1941
  83 years ago

• CPC

  • G03C5/46 - Toning

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof
  • 252 - Compositions
  • 556 - Organic compounds