Patent US3463985A successfully refreshed from Google Patents.
US3463985A
Expired / Lapsed
US
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Closed loop stepping motor control system
Assignee: International Business Machines Corp
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Filing: 1965-06-10
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Granted: 1969-08-26
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Expires: 1985-06-10
Abstract
No abstract record available.
Inventors
- 👤 Thorbjoern R Fredriksen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02P8/20; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/40; C; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |