US2710741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling or hole testing
Assignee: Individual
•
Filing: 1950-07-28
•
Granted: 1955-06-14
•
Expires: 1970-07-28
Abstract
No abstract record available.
Inventors
- 👤 Sr Jesse E Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
E; E21; E21B; E21B21/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US470593A
Cited
US1347534A
Cited
US1853379A
Cited
US1685971A
Cited
US1736017A
Cited
US2098758A
Cited
US2041803A
Cited
US2045368A
Cited
US2072627A
Cited
US2175471A
Cited
US2144842A
Cited
US2128716A
Cited
US2233260A
Cited
US2279129A
Cited
US2293259A
Cited
US2521332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |