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2177664
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Patent Grant
2177664
References
Source
Patent Number
2,177,664
Date Filed
Not available
Date Issued
Tuesday, October 31, 1939
84 years ago
CPC
C11C1/106 - inert gases or vapors
US Classifications
203 - Distillation: processes, separatory
159 - Concentrating evaporators
202 - Distillation: apparatus
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