Patent US671907A successfully refreshed from Google Patents.
US671907A
Expired / Lapsed
US
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Controller for motors.
Assignee: NORTHERN ELECTRICAL Manufacturing Co
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Filing: 1900-07-09
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Granted: 1901-04-09
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Expires: 1920-07-09
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/60; H01H19/62
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) | 1904-04-08 | 1904-10-08 | 1905-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-04-08 | 1908-10-08 | 1909-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-04-08 | 1912-10-08 | 1913-04-09 | $7700.00 | Window Closed / Lapsed |