US3443234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driftless direct current amplifier
Assignee: Alcatel CIT SA
•
Filing: 1965-10-22
•
Granted: 1969-05-06
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Pierre Bizet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:15
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/303; H03F15/00; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03F3/38; H03F3/40; H03F3/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3189838A
Cited
US3317835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |