US3370189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepper motor having a stator biasing magnet
Assignee: Tri Tech Inc
•
Filing: 1966-10-14
•
Granted: 1968-02-20
•
Expires: 1986-10-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Haydon
- 👤 Iii Edward Herbert
- 👤 William D Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:02
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; H02K37/14; H02K37/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2890400A
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US2101665A
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US2867762A
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US2864018A
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US3077546A
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US2968755A
Cited
US3042818A
Cited
US3119941A
Cited
US3142774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |