1997745

Information

• Patent Grant
• 1997745

• References
• Source

• Patent Number

  1,997,745

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1935
  89 years ago

• CPC

  • G03C1/785 - translucent

• US Classifications

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