US3391318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for step motors
Assignee: Tokyo Keiki Inc
•
Filing: 1965-08-11
•
Granted: 1968-07-02
•
Expires: 1985-08-11
Abstract
No abstract record available.
Inventors
- 👤 Hirokawa Yoichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:48
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/40; G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; H02P5/00; H02P5/46; H02P5/48; H02P5/49
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB396855A
Cited
US2287569A
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US2424843A
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US2725512A
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US2808556A
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US2790124A
Cited
US2961589A
Cited
US3001118A
Cited
US3327185A
Cited
US3250977A
Cited
US3225277A
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 |