US3391289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic stepping device
Assignee: Plessey UK Ltd
•
Filing: 1965-03-16
•
Granted: 1968-07-02
•
Expires: 1985-03-16
Abstract
No abstract record available.
Inventors
- 👤 Danilewicz Ludomir
- 👤 Leonard S Danilewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:40
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/06; H02K7/065; F; F16; F16D; F16D41/00; F16H; F16H31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1422243A
Cited
US1640742A
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US2475232A
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US3162796A
Cited
US3159759A
Cited
US3293580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |