US2706248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems for magnetic and electric electron flow control
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1950-02-13
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Granted: 1955-04-12
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Expires: 1970-02-13
Abstract
No abstract record available.
Inventors
- 👤 Lindberg Lennart
- 👤 Bjorkman Jonas
- 👤 Romell Dag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2141322A
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US2173252A
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US2157336A
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US2395299A
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US2563807A
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US2477008A
Cited
US2591997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |