US3375433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the output frequency of a generator driven by a wound rotor induction motor
Assignee: ELECTRIC PRODUCTS CO
•
Filing: 1964-10-05
•
Granted: 1968-03-26
•
Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 John K Haggerty
- 👤 Leonard A Lowe
- 👤 Peter C Mchale
- 👤 James J Unger
- 👤 Robert E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3200323A
Cited
US3151288A
Cited
US3242346A
Cited
US3154733A
Cited
US3211987A
Cited
US3254293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |