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US2967577A
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Turbines for the actuation of drills
Assignee: Individual
•
Filing: 1957-08-02
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Granted: 1961-01-10
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Expires: 1977-08-02
Abstract
No abstract record available.
Inventors
- 👤 Tiraspolsky Wladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:05
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/70; Y10T403/7047; Y10T403/7061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US460369A
Cited
US1030387A
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US2340738A
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US2717762A
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US2783971A
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US2801079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |