Patent US3372288A successfully refreshed from Google Patents.
US3372288A
Expired / Lapsed
US
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Sequential switching with delay for controlled rectifier circuits
Assignee: Singer Co
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Filing: 1964-08-24
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Granted: 1968-03-05
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Wigington Jerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:16
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/54; H01H9/547; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295; H01H9/548
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |