US3143665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon control rectifier switching circuit having variable delay
Assignee: Lucas Support Services Ltd
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Filing: 1962-04-02
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Granted: 1964-08-04
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Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Smith Sidney Basil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:26
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K3/00; H03K3/02; H03K3/35; H03K3/352
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3015739A
Cited
US3097335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |