US3452258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-analog feedback control system employing solid state digital potentiometer
Assignee: Westinghouse Electric Corp
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Filing: 1966-08-19
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Granted: 1969-06-24
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Expires: 1986-08-19
Abstract
No abstract record available.
Inventors
- 👤 Francis T Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:29
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/24; H; H03; H03M; H03M1/00; H03M1/12; H03M1/48
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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |