US2426256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweep circuit
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1944-07-08
•
Granted: 1947-08-26
•
Expires: 1964-07-08
Abstract
No abstract record available.
Inventors
- 👤 Hughes M Zenor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:36
CPC Classifications
H; H03; H03K; H03K6/00; H03K6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085100A
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US1978461A
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FR792921A
Cited
US2287540A
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US2295293A
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US2354768A
Cited
US2306230A
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US2340880A
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US2320916A
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US2353733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |