US2901735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic amplifier drive for coincident current switch
Assignee: Unisys Corp
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Filing: 1955-04-29
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Granted: 1959-08-25
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph D Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/81
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |