US2624549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of rotary drilling
Assignee: Individual
•
Filing: 1947-03-24
•
Granted: 1953-01-06
•
Expires: 1967-03-24
Abstract
No abstract record available.
Inventors
- 👤 Oakie G Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1357564A
Cited
US1660033A
Cited
US1706072A
Cited
US1686945A
Cited
US1794196A
Cited
US1766326A
Cited
US1844257A
Cited
US2317021A
Cited
US2329939A
Cited
GB545271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |