Patent US2499390A successfully refreshed from Google Patents.
US2499390A
Expired / Lapsed
US
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Rotor for alternating current machines
Assignee: MASTER ELECTRIC CO
•
Filing: 1944-07-10
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Granted: 1950-03-07
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Expires: 1964-07-10
Abstract
No abstract record available.
Inventors
- 👤 Henry M Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:47
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/16; H02K17/168; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1341682A
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US1508152A
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US1695799A
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US2248167A
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US2221605A
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US2386930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |