US59936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in method of increasing capacity of oil-wells
Assignee: —
•
Filing: —
•
Granted: 1866-11-20
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Expires: 1883-11-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:37
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/10; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263
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) | 1869-11-19 | 1870-05-21 | 1870-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-11-19 | 1874-05-21 | 1874-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-11-19 | 1878-05-21 | 1878-11-20 | $7700.00 | Window Closed / Lapsed |