Patent US2970252A successfully refreshed from Google Patents.
US2970252A
Expired / Lapsed
US
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Current regulator with saturable core
Assignee: North American Aviation Corp
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Filing: 1955-06-17
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Granted: 1961-01-31
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Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
- 👤 Wallace J Obenberger
- 👤 Charles E Burgi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:25
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/04; H02J7/12; H02J7/90; H02J7/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733402A
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US2018348A
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US2079500A
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US2504675A
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US2596685A
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US2509380A
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US2611889A
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US2723372A
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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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |