Patent US2438784A successfully refreshed from Google Patents.
US2438784A
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US
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Tuner for ultra high frequencies
Assignee: EMI Ltd
•
Filing: 1943-10-11
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Granted: 1948-03-30
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Expires: 1963-10-11
Abstract
No abstract record available.
Inventors
- 👤 Landmann Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:23
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1664518A
Cited
US2120518A
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US2193500A
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US2246928A
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US2341345A
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US2367681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |