US2902547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor controlled magnetic amplifier
Assignee: Unisys Corp
•
Filing: 1954-12-01
•
Granted: 1959-09-01
•
Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 Lothair H Rowley
- 👤 Milenbach Hermane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
H; H03; H03F; H03F9/00; H03F9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB684626A
Cited
US2683853A
Cited
US2653282A
Cited
US2770770A
Cited
US2809343A
Cited
US2819352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |