Patent US3491247A successfully refreshed from Google Patents.
US3491247A
Expired / Lapsed
US
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Accurate once-around pulse generating system
Assignee: Ampex Corp
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Filing: 1967-06-07
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Granted: 1970-01-20
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Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 James W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:31
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/486; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2688126A
Cited
US2796598A
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US2769949A
Cited
US3024986A
Cited
US3195120A
Cited
DE1191986B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |