US2523725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning plunger for variable resonant cavities
Assignee: AT&T Inc
•
Filing: 1945-11-03
•
Granted: 1950-09-26
•
Expires: 1965-11-03
Abstract
No abstract record available.
Inventors
- 👤 John H Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:19
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; H03; H03F; H03F3/00; H03F3/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2086905A
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US2125900A
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US2278744A
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US2416565A
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US2379047A
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US2438912A
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US2434508A
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US2358462A
Cited
US2422160A
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US2407147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |