Patent US522506A successfully refreshed from Google Patents.
US522506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric converter
Assignee: —
•
Filing: —
•
Granted: 1894-07-03
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Expires: 1911-07-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02
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) | 1897-07-02 | 1898-01-01 | 1898-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-07-03 | 1902-01-02 | 1902-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-07-03 | 1906-01-02 | 1906-07-04 | $7700.00 | Window Closed / Lapsed |