US3467448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit bearing seal assembly including resiliently mounted rigid ring
Assignee: Hughes Tool Co
•
Filing: 1965-11-24
•
Granted: 1969-09-16
•
Expires: 1985-11-24
Abstract
No abstract record available.
Inventors
- 👤 Edward M Galle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US901866A
Cited
US2362363A
Cited
US2622905A
Cited
US2654325A
Cited
US2742306A
Cited
US3001385A
Cited
FR1260080A
Cited
US3116931A
Cited
US3303898A
Cited
US3244457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |