US2974271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1957-07-08
•
Granted: 1961-03-07
•
Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Fred H Guth
- 👤 John V Majercak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:10
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2078880A
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US2638571A
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US2562744A
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US2641738A
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US2780769A
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US2714188A
Cited
US2793338A
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US2809341A
Cited
US2814773A
Cited
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 |