US3482889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizers for drilling strings
Assignee: DRILTROL
•
Filing: 1967-09-18
•
Granted: 1969-12-09
•
Expires: 1987-09-18
Abstract
No abstract record available.
Inventors
- 👤 John F Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:06
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7009; Y10T403/7011; Y10T403/7013
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1183904A
Cited
US1888216A
Cited
US1860659A
Cited
US1890529A
Cited
US1905158A
Cited
US2162426A
Cited
US2188119A
Cited
US2288124A
Cited
US2440441A
Cited
US2855052A
Cited
US2927645A
Cited
US2989326A
Cited
US2998848A
Cited
US3164216A
Cited
US3322217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |