Patent US673239A successfully refreshed from Google Patents.
US673239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulation and control of electric motors.
Assignee: H WARD LEONARD
•
Filing: 1895-03-22
•
Granted: 1901-04-30
•
Expires: 1915-03-22
Abstract
No abstract record available.
Inventors
- 👤 James Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:43
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1904-04-29 | 1904-10-29 | 1905-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-04-29 | 1908-10-29 | 1909-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-04-29 | 1912-10-29 | 1913-04-30 | $7700.00 | Window Closed / Lapsed |