Patent US2644931A successfully refreshed from Google Patents.
US2644931A
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US
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Supervisory control system
Assignee: Westinghouse Electric Corp
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Filing: 1952-03-28
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Granted: 1953-07-07
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Expires: 1972-03-28
Abstract
No abstract record available.
Inventors
- 👤 Willard A Derr
- 👤 Maurice E Reagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:53
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/18; H02J13/333; H02J13/13; H02J13/34; Y; Y02; Y02E; Y02E60/00; Y04; Y04S; Y04S10/00; Y04S10/18; Y04S40/00; Y04S40/12
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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |