Patent US2646469A successfully refreshed from Google Patents.
US2646469A
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Balanced multichannel amplifier for wide amplitude range
Assignee: United States Department of the Navy
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Filing: 1950-02-21
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Granted: 1953-07-21
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Expires: 1970-02-21
Abstract
No abstract record available.
Inventors
- 👤 John H Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:53
CPC Classifications
G; G01; G01M; G01M7/00; G01M7/02; G01M7/025; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711658A
Cited
US2253832A
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US2324314A
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US2457214A
Cited
US2396395A
Cited
US2464353A
Cited
US2482759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |