2220929

Information

• Patent Grant
• 2220929

• References
• Source

• Patent Number

  2,220,929

• Date Filed

  Not available

• Date Issued

  Tuesday, November 12, 1940
  84 years ago

• CPC

  • G03C5/3014 - Hydrazine; Hydroxylamine; Urea; Derivatives thereof

• US Classifications

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