Patent US3399391A successfully refreshed from Google Patents.
US3399391A
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US
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Holding circuit for servo mechanism
Assignee: Unisys Corp
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Filing: 1964-06-10
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Granted: 1968-08-27
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jerrold P Barrosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G05; G05D; G05D3/00; G05D3/12; G05D3/20; G11B5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3209338A
Cited
US3126535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |