US13646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Island
Assignee: —
•
Filing: —
•
Granted: 1855-10-09
•
Expires: 1872-10-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/027; E21B7/028
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) | 1858-10-08 | 1859-04-09 | 1859-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1862-10-08 | 1863-04-09 | 1863-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1866-10-08 | 1867-04-09 | 1867-10-09 | $7700.00 | Window Closed / Lapsed |