US3569999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.c. control circuit
Assignee: Grigsby Barton Inc
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Filing: 1968-10-18
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Granted: 1971-03-09
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Expires: 1988-10-18
Abstract
Abstract A ZERO-VOLTAGE A.C. SWITCHING CIRCUIT OPERATES SYNCHRONOUSLY WITH THE LINE, AND MAY BE USED TO CONTROL THE APPLICATION AD REMOVAL OF POWER TO OR FROM A HIGHLY REACTIVE LOAD, AS WELL AS A RESISTIVE LOAD, WITHOUT LOSS OF SYNCHRONISM OR SWITCH CONROL.
Inventors
- 👤 Joseph E Pascente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:58
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/13; H03K17/136; H02; H02M; H02M1/00; H02M1/08; H02M1/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |