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2677070
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Information
Patent Grant
2677070
References
Source
Patent Number
2,677,070
Date Filed
Not available
Date Issued
Tuesday, April 27, 1954
70 years ago
CPC
H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
H01J17/12 - Control electrodes
H01J19/30 - characterised by the material
H01J2893/0019 - Chemical composition and manufacture
H01J2893/0023 - carbonising and other surface treatments
US Classifications
313 - Electric lamp and discharge devices
315 - Electric lamp and discharge devices: systems
427 - Coating processes
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