2354149

Information

• Patent Grant
• 2354149

• References
• Source

• Patent Number

  2,354,149

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1944
  80 years ago

• CPC

  • G03F3/06 - by masking

• US Classifications

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