Patent US370573A successfully refreshed from Google Patents.
US370573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating device for alternate-current circuits
Assignee: —
•
Filing: —
•
Granted: 1887-09-27
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Expires: 1904-09-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
H; H02; H02J; H02J50/00; H02J50/10; H02J4/00; H02J4/20; H02J4/25
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) | 1890-09-26 | 1891-03-28 | 1891-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1894-09-26 | 1895-03-28 | 1895-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1898-09-26 | 1899-03-28 | 1899-09-27 | $7700.00 | Window Closed / Lapsed |