US2708973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bridging well fissures
Assignee: Individual
•
Filing: 1951-04-09
•
Granted: 1955-05-24
•
Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Homer L Twining
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:07
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1716925A
Cited
US2064936A
Cited
US2079517A
Cited
US2100684A
Cited
US2216067A
Cited
US2504462A
Cited
US2577610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |