US245101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dexter j
Assignee: —
•
Filing: —
•
Granted: 1881-08-02
•
Expires: 1898-08-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:12
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/126
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) | 1884-08-01 | 1885-01-31 | 1885-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1888-08-01 | 1889-01-31 | 1889-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1892-08-01 | 1893-01-31 | 1893-08-02 | $7700.00 | Window Closed / Lapsed |