US2908534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing assembly for the shaft of underground hydraulic turbines for driving drill bits in deep-well drilling
Assignee: MANNESMANN TRAUZL AG
•
Filing: 1957-04-02
•
Granted: 1959-10-13
•
Expires: 1977-04-02
Abstract
No abstract record available.
Inventors
- 👤 Rietsch Herwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:17
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/22; E; E21; E21B; E21B4/00; E21B4/02; F16C17/00; F16C17/04; F16C17/26; F16C2352/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |