US2990157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling ball clutched pipe hoists
Assignee: Individual
•
Filing: 1959-03-17
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Granted: 1961-06-27
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Expires: 1979-03-17
Abstract
No abstract record available.
Inventors
- 👤 Lee R Mcguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:31
CPC Classifications
E; E21; E21B; E21B19/00; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19181; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19712; Y10T74/19744; Y10T74/19749
Claims Analysis
Total Claims: 0
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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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |