US2504494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission line seal for electron discharge devices
Assignee: EMI Ltd
•
Filing: 1944-05-29
•
Granted: 1950-04-18
•
Expires: 1964-05-29
Abstract
No abstract record available.
Inventors
- 👤 Bull Cabot Seaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:07
CPC Classifications
H; H01; H01R; H01R24/00; H01R24/38; H01R24/40; H01R24/42; H01R24/44; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065; H01J5/00; H01J5/32; H01R2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US782749A
Cited
US908378A
Cited
AU2094835A
Cited
US2165961A
Cited
US2241505A
Cited
US2289846A
Cited
US2330381A
Cited
US2376725A
Cited
US2408271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |