1819981

Information

• Patent Grant
• 1819981

• References
• Source

• Patent Number

  1,819,981

• Date Filed

  Not available

• Date Issued

  Tuesday, August 18, 1931
  93 years ago

• CPC

  • G03C7/06 - Manufacture of colour screens
  • Y10S430/135 - Cine film

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof
  • 352 - Optics: motion pictures