US2644860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency wide band amplifier
Assignee: United States Department of the Navy
•
Filing: 1946-02-05
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Granted: 1953-07-07
•
Expires: 1966-02-05
Abstract
No abstract record available.
Inventors
- 👤 Christopher P Gadsden
- 👤 Alan B Macnee
- 👤 Wallman Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:24
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1325879A
Cited
US2045315A
Cited
US2058432A
Cited
US2093078A
Cited
US2298629A
Cited
US2298297A
Cited
US2463229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |