DE726048C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the production of black coatings on metal parts of electron tubes
Assignee: Siemens Corp
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Filing: 1938-01-04
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Granted: 1942-10-06
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Expires: 1958-01-04
Abstract
No abstract record available.
Inventors
- 👤 Dr-Ing Erich Schwarz Bergkampf
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-05 00:56
CPC Classifications
H; H01; H01J; H01J19/00; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0023
Claims Analysis
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References Cited (Backward Citations)
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