US3510699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable reluctance electric stepping motor with bias winding and field energizing circuitry
Assignee: Superior Electric Co
•
Filing: 1969-02-10
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Granted: 1970-05-05
•
Expires: 1989-02-10
Abstract
No abstract record available.
Inventors
- 👤 Gustav O Fredrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:40
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/02; H02K37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE25445E
Cited
US3077555A
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US3117268A
Cited
US3075108A
Cited
US3206623A
Cited
US3293459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |