Patent US673911A successfully refreshed from Google Patents.
US673911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase alternating-current motor.
Assignee: Westinghouse Electric Corp
•
Filing: 1899-01-30
•
Granted: 1901-05-14
•
Expires: 1919-01-30
Abstract
No abstract record available.
Inventors
- 👤 Benjamin G Lamme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; H02P7/2985
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) | 1904-05-13 | 1904-11-12 | 1905-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-05-13 | 1908-11-12 | 1909-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-05-13 | 1912-11-12 | 1913-05-14 | $7700.00 | Window Closed / Lapsed |