US209486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in tools for extracting obstructions from deep wells
Assignee: —
•
Filing: —
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Granted: 1878-10-29
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Expires: 1895-10-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:59
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/18; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/935; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17179; Y10T279/17213; Y10T279/17564; Y10T279/17598
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) | 1881-10-28 | 1882-04-29 | 1882-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-10-28 | 1886-04-29 | 1886-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-10-28 | 1890-04-29 | 1890-10-29 | $7700.00 | Window Closed / Lapsed |