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2139791
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Information
Patent Grant
2139791
References
Source
Patent Number
2,139,791
Date Filed
Not available
Date Issued
Tuesday, December 13, 1938
85 years ago
CPC
H01L21/168 - Treatment of the complete device
H01L21/02565 - Oxide semiconducting materials not being Group 12/16 materials
H01L21/02614 - Transformation of metal
H01L21/164 - Oxidation and subsequent heat treatment of the foundation plate
H01L21/165 - Reduction of the copper oxide, treatment of the oxide layer
US Classifications
205 - Electrolysis: processes, compositions used therein, and methods of preparing the compositions
148 - Metal treatment
257 - Active solid-state devices
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