US2638324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck mechanism for an oil well drilling apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1948-05-04
•
Granted: 1953-05-12
•
Expires: 1968-05-04
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ball
- 👤 Edward M Luce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690469A
Cited
US2126933A
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US2114305A
Cited
US2214370A
Cited
US2334312A
Cited
US2393603A
Cited
US2570308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |