US2634955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drill
Assignee: Individual
•
Filing: 1950-05-15
•
Granted: 1953-04-14
•
Expires: 1970-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jeners S Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:58
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US334594A
Cited
US1131701A
Cited
US1139529A
Cited
US1176273A
Cited
US1399831A
Cited
US1747909A
Cited
US1816203A
Cited
US1871736A
Cited
US2058750A
Cited
US2333746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |