US3446992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bus voltage compensation circuit for controlling direct current motor
Assignee: National Aeronautics and Space Administration
•
Filing: 1966-12-27
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Granted: 1969-05-27
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Walter A Barniskis
- 👤 John W Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2714693A
Cited
US3214666A
Cited
US3191113A
Cited
US3223912A
Cited
US3358206A
Cited
US3378745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |