2186685

Information

• Patent Grant
• 2186685

• References
• Source

• Patent Number

  2,186,685

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1940
  85 years ago

• CPC

  • G03C7/3815 - with one heterocyclic ring

• US Classifications

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