US191308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in grindstone sharpening attachments
Assignee: —
•
Filing: —
•
Granted: 1877-05-29
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Expires: 1894-05-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:25
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/55
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) | 1880-05-28 | 1880-11-27 | 1881-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1884-05-28 | 1884-11-27 | 1885-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1888-05-28 | 1888-11-27 | 1889-05-29 | $7700.00 | Window Closed / Lapsed |