US650147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underreamer.
Assignee: WALLACE L HARDISON
•
Filing: 1899-07-08
•
Granted: 1900-05-22
•
Expires: 1919-07-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:21
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) | 1903-05-22 | 1903-11-21 | 1904-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-05-22 | 1907-11-21 | 1908-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-05-22 | 1911-11-21 | 1912-05-22 | $7700.00 | Window Closed / Lapsed |