US3022729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling boreholes with explosive charges
Assignee: Jersey Production Research Co
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Filing: 1959-11-27
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Granted: 1962-02-27
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Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Leon Haynsworth Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:46
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/007; F; F42; F42B; F42B3/00; F42B3/08; F42C; F42C5/00; F42C7/00; F42C7/12
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |