US2997611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular hysteresis electric motor
Assignee: Individual
•
Filing: 1956-07-02
•
Granted: 1961-08-22
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jacob S Feiner
- 👤 Alfred B Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE551177C
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GB389158A
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GB400435A
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US1995726A
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US2070447A
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GB493928A
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US2304688A
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US2421301A
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US2543816A
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US2572632A
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US2665389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |