US3538412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system with three phase conversion
Assignee: General Electric Co
•
Filing: 1969-05-05
•
Granted: 1970-11-03
•
Expires: 1989-05-05
Abstract
No abstract record available.
Inventors
- 👤 Carlton E Graf
- 👤 Henry J Havlicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/903; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2989676A
Cited
US3089992A
Cited
US3181046A
Cited
US3332000A
Cited
US3345549A
Cited
US3355647A
Cited
US3413534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |