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Patent US2837709A successfully refreshed from Google Patents.
US2837709A
Expired / Lapsed
US
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Power supply
Assignee: Q O S CORP
•
Filing: 1953-12-21
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Granted: 1958-06-03
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Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Milinowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:09
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1993914A
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US2046952A
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US2236254A
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US2377180A
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US2473617A
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US2420311A
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US2467753A
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US2590821A
Cited
US2738466A
Cited
US2738444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |