US400809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternatinq-current electric reciprocating engine
Assignee: —
•
Filing: —
•
Granted: 1889-04-02
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Expires: 1906-04-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:25
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12
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) | 1892-04-01 | 1892-10-01 | 1893-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1896-04-01 | 1896-10-01 | 1897-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1900-04-02 | 1900-10-02 | 1901-04-03 | $7700.00 | Window Closed / Lapsed |