Patent US2852711A successfully refreshed from Google Patents.
US2852711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical rotor apparatus
Assignee: Motors Liquidation Co
•
Filing: 1954-10-13
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Granted: 1958-09-16
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Expires: 1974-10-13
Abstract
No abstract record available.
Inventors
- 👤 William J Derner
- 👤 Roger W Burtness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:25
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US630409A
Cited
US789454A
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FR338903A
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GB191317268A
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US1502527A
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US1608314A
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DE629490C
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US2209334A
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US2209335A
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US2460063A
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GB629063A
Cited
US2551030A
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US2524555A
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US2593857A
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US2632861A
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US2685658A
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |