US3447608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open hole cement plugging
Assignee: Schlumberger Technology Corp
•
Filing: 1966-04-15
•
Granted: 1969-06-03
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Expires: 1986-04-15
Abstract
No abstract record available.
Inventors
- 👤 William Charles David Fry
- 👤 Patrick Neilan Parker
- 👤 William M Ross Jr
- 👤 Jimmy H Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:47
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2075882A
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US2236987A
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US2219325A
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US2206389A
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US2880096A
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US2985239A
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US3220863A
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US3079268A
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US3140269A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |