US729743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underreamer for drilling oil-wells.
Assignee: Individual
•
Filing: 1902-05-09
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Granted: 1903-06-02
•
Expires: 1922-05-09
Abstract
No abstract record available.
Inventors
- 👤 Moses H Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/325
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) | 1906-06-01 | 1906-12-01 | 1907-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-06-01 | 1910-12-01 | 1911-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-06-01 | 1914-12-01 | 1915-06-02 | $7700.00 | Window Closed / Lapsed |