Patent US2974235A successfully refreshed from Google Patents.
US2974235A
Expired / Lapsed
US
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Power generator control system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1957-02-12
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Granted: 1961-03-07
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Expires: 1977-02-12
Abstract
No abstract record available.
Inventors
- 👤 Fred H Guth
- 👤 Blake John Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:19
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |