US3467902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step motor drive control circuit
Assignee: Fujitsu Ltd
•
Filing: 1966-08-03
•
Granted: 1969-09-16
•
Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 Kanryo Shimizu
- 👤 Norito Yoshitake
- 👤 Kengo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:49
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3243600A
Cited
US3109131A
Cited
US3112433A
Cited
US3277380A
Cited
US3297927A
Cited
US3323067A
Cited
US3354367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |