US2939197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck mechanism for drill pipe
Assignee: Joy Manufacturing Co
•
Filing: 1956-09-05
•
Granted: 1960-06-07
•
Expires: 1976-09-05
Abstract
No abstract record available.
Inventors
- 👤 Leven Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:01
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/16; B23B31/16045; B23B31/1605; B23B31/16054; Y; Y10; Y10T; Y10T279/00; Y10T279/19; Y10T279/1913; Y10T279/1986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1446060A
Cited
US1460567A
Cited
US1966454A
Cited
US2570308A
Cited
US2419711A
Cited
US2564119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |