US2844750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focused electron flow electron tube for very high frequencies
Assignee: Siemens and Halske AG
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Filing: 1955-07-18
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Granted: 1958-07-22
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Veith Werner
- 👤 Meyerer Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:23
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2149101A
Cited
US2219193A
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US2200039A
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US2305761A
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US2403529A
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US2619607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |