US2936346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of amplification of direct currents or voltages
Assignee: Compagnie Francaise Thomson Houston SA
•
Filing: 1957-02-01
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Granted: 1960-05-10
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Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 Albert H Warnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36; H03F3/38; H03F3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2175270A
Cited
US2379513A
Cited
US2453454A
Cited
GB657690A
Cited
US2700149A
Cited
US2820895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |