US2750548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled synchronous electromotor
Assignee: Government of Netherlands
•
Filing: 1953-03-02
•
Granted: 1956-06-12
•
Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Christiaan Johannes Van Dalen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:34
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/02; H04L17/12; H02; H02K; H02K29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353025A
Cited
US1945511A
Cited
US2432140A
Cited
US2579231A
Cited
US2477993A
Cited
US2631264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |