US8840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
James hamilton
Assignee: —
•
Filing: —
•
Granted: 1852-03-30
•
Expires: 1869-03-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:21
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/006; Y; Y10; Y10S; Y10S37/00; Y10S37/906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1855-03-30 | 1855-09-29 | 1856-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1859-03-30 | 1859-09-29 | 1860-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1863-03-30 | 1863-09-29 | 1864-03-30 | $7700.00 | Window Closed / Lapsed |