US3384189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling method and compositions therefor
Assignee: Gulf Research and Development Co
•
Filing: 1965-12-27
•
Granted: 1968-05-21
•
Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Pekarek
- 👤 Paul W Schaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:40
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2276075A
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US2870990A
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US2919898A
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US3040822A
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US3112800A
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US3081828A
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US3289775A
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US3322214A
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 |