Patent US1720189A successfully refreshed from Google Patents.
US1720189A
Expired / Lapsed
US
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Electric-motor-control system
Assignee: Individual
•
Filing: 1926-03-05
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Granted: 1929-07-09
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Expires: 1946-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jackson Albert Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:41
CPC Classifications
B; B60; B60L; B60L15/00; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-07-08 | 1933-01-07 | 1933-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-08 | 1937-01-07 | 1937-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-08 | 1941-01-07 | 1941-07-09 | $7700.00 | Window Closed / Lapsed |