US773962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill and underreamer.
Assignee: Individual
•
Filing: 1904-05-31
•
Granted: 1904-11-01
•
Expires: 1924-05-31
Abstract
No abstract record available.
Inventors
- 👤 Edward Mccray
- 👤 Frank A Wiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:28
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; E21B10/40
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) | 1907-11-01 | 1908-05-02 | 1908-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-11-01 | 1912-05-02 | 1912-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-11-01 | 1916-05-02 | 1916-11-01 | $7700.00 | Window Closed / Lapsed |