Patent US518037A successfully refreshed from Google Patents.
US518037A
Expired / Lapsed
US
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Electrical annunciator
Assignee: —
•
Filing: —
•
Granted: 1894-04-10
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Expires: 1911-04-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
H; H03; H03M; H03M1/00; G; G09; G09F; G09F11/00; G09F11/24; G09F11/26; G09F11/28
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) | 1897-04-09 | 1897-10-09 | 1898-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-04-10 | 1901-10-10 | 1902-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-04-10 | 1905-10-10 | 1906-04-11 | $7700.00 | Window Closed / Lapsed |