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US2965782A
Expired / Lapsed
US
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Magnetic focusing systems for travelling wave tubes
Assignee: Teledyne UK Ltd
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Filing: 1959-03-09
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Granted: 1960-12-20
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Expires: 1979-03-09
Abstract
No abstract record available.
Inventors
- 👤 Weaver Francis James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:27
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J23/0873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2841739A
Cited
US2844754A
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US2867745A
Cited
US2925519A
Cited
US2895066A
Cited
US2882439A
Cited
US2876373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |