US381013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isaac n
Assignee: —
•
Filing: —
•
Granted: 1888-04-10
•
Expires: 1905-04-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/122
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) | 1891-04-10 | 1891-10-10 | 1892-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1895-04-10 | 1895-10-10 | 1896-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1899-04-10 | 1899-10-10 | 1900-04-11 | $7700.00 | Window Closed / Lapsed |