US3453515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency polyphase current generator for controlling the speed of an electric motor
Assignee: OXYMILL
•
Filing: 1966-09-26
•
Granted: 1969-07-01
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert Millois
- 👤 Jean Peiffert
- 👤 Georges Stcherbatcheff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/257; H02M5/2573; H02M1/00; H02M1/08; H02P; H02P8/00; H02P8/14; H02P8/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2788476A
Cited
US2935660A
Cited
US3171073A
Cited
US3150303A
Cited
US3308307A
Cited
US3331006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |