Patent US2415141A successfully refreshed from Google Patents.
US2415141A
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US
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Tunable ultra high frequency apparatus
Assignee: Hazeltine Research Inc
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Filing: 1943-09-25
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Granted: 1947-02-04
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Expires: 1963-09-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Malling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:10
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/02; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835; H03J; H03J3/00; H03J3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2192494A
Cited
US2233763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |