US2963102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic drill bit
Assignee: Individual
•
Filing: 1956-08-13
•
Granted: 1960-12-06
•
Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 James E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:39
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US833055A
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US862972A
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US1445289A
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US1448818A
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GB296352A
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US2027063A
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US2108955A
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US2169223A
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US2233260A
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US2212491A
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US2307658A
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US2540464A
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US2776115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |