US3341237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill coupling tool
Assignee: Individual
•
Filing: 1965-07-06
•
Granted: 1967-09-12
•
Expires: 1985-07-06
Abstract
No abstract record available.
Inventors
- 👤 Emilio A Anzalone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/03; E21B17/04; E21B17/042; E21B17/0426
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US484764A
Cited
US647953A
Cited
US1211080A
Cited
US1645802A
Cited
US1714818A
Cited
US2569275A
Cited
US3153356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |