Patent US3759359A successfully refreshed from Google Patents.
Patent US3370658A successfully refreshed from Google Patents.
US3370658A
Expired / Lapsed
US
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Drill and tube arrangement with knock-of drill portion
Assignee: Individual
•
Filing: 1965-08-03
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Granted: 1968-02-27
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Expires: 1985-08-03
Abstract
No abstract record available.
Inventors
- 👤 Bengt K B Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; E21B10/38; E21B10/64; E21B21/00; E21B21/01; E21B21/12; E21B7/00; E21B7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1295969A
Cited
US2023966A
Cited
US2121858A
Cited
US2588068A
Cited
US2914306A
Cited
US3022840A
Cited
US3227230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |