US2857536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reluctance machine
Assignee: Individual
•
Filing: 1955-07-18
•
Granted: 1958-10-21
•
Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Edward C Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:38
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US586823A
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US1495784A
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US2275827A
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CH233460A
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US2378668A
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US2413805A
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US2561890A
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US2535911A
Cited
DE902883C
Cited
US2703373A
Cited
GB697371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |