US3369172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuits
Assignee: ZF International UK Ltd
•
Filing: 1964-05-14
•
Granted: 1968-02-13
•
Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Wright Maurice James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:36
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/2913; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3151288A
Cited
US3223852A
Cited
US3192462A
Cited
US3303389A
Cited
US3200304A
Cited
US3299303A
Cited
US3271700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |