US27818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial slate
Assignee: —
•
Filing: —
•
Granted: 1860-04-10
•
Expires: 1877-04-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
H; H10; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/014; H10W10/0143; H10W10/10; H10W10/17
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) | 1863-04-10 | 1863-10-10 | 1864-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-04-10 | 1867-10-10 | 1868-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-04-10 | 1871-10-10 | 1872-04-10 | $7700.00 | Window Closed / Lapsed |