Patent US535503A successfully refreshed from Google Patents.
US535503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leonhardt sounder
Assignee: —
•
Filing: —
•
Granted: 1895-03-12
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Expires: 1912-03-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833
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) | 1898-03-11 | 1898-09-10 | 1899-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-03-12 | 1902-09-11 | 1903-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-03-12 | 1906-09-11 | 1907-03-13 | $7700.00 | Window Closed / Lapsed |