Patent US431131A successfully refreshed from Google Patents.
US431131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling wells
Assignee: —
•
Filing: —
•
Granted: 1890-07-01
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Expires: 1907-07-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:23
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
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) | 1893-06-30 | 1893-12-30 | 1894-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-06-30 | 1897-12-30 | 1898-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-07-01 | 1901-12-31 | 1902-07-02 | $7700.00 | Window Closed / Lapsed |