US3475669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable dynamic direct-current brake circuit for a.c. motor
Assignee: MICRODYNE Inc
•
Filing: 1967-11-14
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Granted: 1969-10-28
•
Expires: 1987-11-14
Abstract
No abstract record available.
Inventors
- 👤 Norman Oltendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:49
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3341758A
Cited
US3421063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |