US2965771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-to-back zener diode bridge gating circuit
Assignee: Ambac International Corp
•
Filing: 1957-09-19
•
Granted: 1960-12-20
•
Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Finkel Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899569A
Cited
US2086601A
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US2275308A
Cited
US2658142A
Cited
US2799829A
Cited
US2789254A
Cited
US2870346A
Cited
US2866103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |