US2954534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for securing in position one or more helices in traveling wave tubes
Assignee: International Standard Electric Corp
•
Filing: 1956-08-22
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Granted: 1960-09-27
•
Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Neufischer Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:29
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/1478
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US931706A
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US1379476A
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US1705895A
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US1885168A
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US2147354A
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US2720609A
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US2611102A
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US2790926A
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GB710847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |