Patent US2542908A successfully refreshed from Google Patents.
US2542908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical tuner for cavity resonators
Assignee: Raytheon Co
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Filing: 1945-04-04
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Granted: 1951-02-20
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Expires: 1965-04-04
Abstract
No abstract record available.
Inventors
- 👤 Palmer P Derby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:33
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2163589A
Cited
US2167201A
Cited
GB509102A
Cited
US2424805A
Cited
US2422465A
Cited
US2466060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |