US2803974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four phase converter drive
Assignee: Motors Liquidation Co
•
Filing: 1953-08-05
•
Granted: 1957-08-27
•
Expires: 1973-08-05
Abstract
No abstract record available.
Inventors
- 👤 Oliver K Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H61/00; F16H61/38; F16H61/48; F16H61/50; F16H61/58; F16H61/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2203177A
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US2298648A
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US2325876A
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US2312849A
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US2456328A
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US2326994A
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US2381772A
Cited
US2578450A
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US2584965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |