US3405912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine for drilling oil wells and gas wells
Assignee: MINISTERUL PETROLULUI
•
Filing: 1966-06-07
•
Granted: 1968-10-15
•
Expires: 1986-06-07
Abstract
No abstract record available.
Inventors
- 👤 Lari Ion
- 👤 Milos Dumitru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:00
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA669679A
Cited
FR1173551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |