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2049896
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Patent Grant
2049896
References
Source
Patent Number
2,049,896
Date Filed
Not available
Date Issued
Tuesday, August 4, 1936
87 years ago
CPC
C09B5/002 - the heterocyclic rings being condensed in peri position and in 1-2 or 2-3 position
C09B1/42 - the acyl groups being residues of an aromatic carboxylic acid
US Classifications
546 - Organic compounds
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