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US3384192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic jet bit
Assignee: Gulf Research and Development Co
•
Filing: 1965-12-27
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Granted: 1968-05-21
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Robert J Goodwin
- 👤 Joseph L Pekarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1661672A
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US2315496A
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US2758653A
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US2785875A
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US3020965A
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US3112800A
Cited
US3081828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |