Patent US2659856A successfully refreshed from Google Patents.
US2659856A
Expired / Lapsed
US
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Duration ratio regulator
Assignee: Raytheon Co
•
Filing: 1948-04-21
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Granted: 1953-11-17
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Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robertson R Gannaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1720724A
Cited
US1874777A
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US2148718A
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US2261699A
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US2270697A
Cited
US2347529A
Cited
US2358391A
Cited
US2541093A
Cited
US2403053A
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US2426599A
Cited
US2448070A
Cited
US2457140A
Cited
US2419340A
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US2454807A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |