US2924121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal shaft drive compound for rotary drilling rigs
Assignee: Oil States Industries Inc
•
Filing: 1956-11-01
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Granted: 1960-02-09
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Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Wilson John Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:24
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/076; E; E21; E21B; E21B3/00; E21B3/02; F16D1/10; F16D1/108; F16D1/112; F16D3/00; F16D3/16; F16D3/26; F16D3/38; F16D3/40; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |