US381968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic motor
Assignee: Individual
•
Filing: 1887-10-12
•
Granted: 1888-05-01
•
Expires: 1907-10-12
Abstract
No abstract record available.
Inventors
- 👤 Nikola Tesla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:48
CPC Classifications
H; H02; H02K; H02K51/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1891-05-01 | 1891-10-31 | 1892-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1895-05-01 | 1895-10-31 | 1896-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1899-05-01 | 1899-10-31 | 1900-05-02 | $7700.00 | Window Closed / Lapsed |