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2163781
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Information
Patent Grant
2163781
References
Source
Patent Number
2,163,781
Date Filed
Not available
Date Issued
Tuesday, June 27, 1939
85 years ago
CPC
G03C5/3035 - containing a diazole ring
G03C5/30 - Developers
G03C5/3028 - Heterocyclic compounds
US Classifications
430 - Radiation imagery chemistry: process, composition, or product thereof
564 - Organic compounds
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