US2929612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping core drill
Assignee: LE BUS ROYALTY CO
•
Filing: 1957-05-20
•
Granted: 1960-03-22
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Sr Franklin L Le Bus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:30
CPC Classifications
E; E21; E21B; E21B25/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1357564A
Cited
US1582904A
Cited
US1905497A
Cited
US2309866A
Cited
US2551995A
Cited
US2776817A
Cited
US2713473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |