US403751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implement for boring wells
Assignee: —
•
Filing: —
•
Granted: 1889-05-21
•
Expires: 1906-05-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935
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) | 1892-05-20 | 1892-11-19 | 1893-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1896-05-20 | 1896-11-19 | 1897-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1900-05-21 | 1900-11-20 | 1901-05-22 | $7700.00 | Window Closed / Lapsed |