US3418494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current gate
Assignee: Nortel Networks Ltd
•
Filing: 1964-08-24
•
Granted: 1968-12-24
•
Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 John N Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:05
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/80; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/68
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2891171A
Cited
US3153187A
Cited
US3067389A
Cited
US3155837A
Cited
US3119029A
Cited
US3187260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |