Patent US1213963A successfully refreshed from Google Patents.
US3463252A
Expired / Lapsed
US
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Automatic driller
Assignee: Smith International Inc
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Filing: 1966-09-19
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Granted: 1969-08-26
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Charles E Miller
- 👤 William R Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:10
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B19/00; E21B19/08; E21B19/084; E21B44/00; E21B44/005; E21B47/00; E21B47/09; E21B47/095
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |