US2719248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Individual
•
Filing: 1948-06-08
•
Granted: 1955-09-27
•
Expires: 1968-06-08
Abstract
No abstract record available.
Inventors
- 👤 Josephson Bengt Adolf Sanmel
- 👤 Josephson Olof Gustaf Teodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2361766A
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US2597360A
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US2584987A
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US2576093A
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US2458291A
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US2488452A
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US2540835A
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US2568336A
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US2452157A
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US2567359A
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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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |