Patent US491723A successfully refreshed from Google Patents.
US491723A
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US
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Dredging apparatus
Assignee: —
•
Filing: —
•
Granted: 1893-02-14
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Expires: 1910-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/081
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) | 1896-02-14 | 1896-08-15 | 1897-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-02-14 | 1900-08-16 | 1901-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-02-15 | 1904-08-16 | 1905-02-15 | $7700.00 | Window Closed / Lapsed |