US2419124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating means for metallic spacers in electron discharge devices
Assignee: Westinghouse Electric Corp
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Filing: 1943-11-10
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Granted: 1947-04-15
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Expires: 1963-11-10
Abstract
No abstract record available.
Inventors
- 👤 Hampton J Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:56
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |