US3368623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable cement for wells
Assignee: Halliburton Co
•
Filing: 1965-05-03
•
Granted: 1968-02-13
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Lloyd G Carter
- 👤 Dwight K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; C; C09; C09K; C09K8/00; C09K8/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126959A
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US2294294A
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US2187895A
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US2193808A
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US2265923A
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US2673825A
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US2805719A
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US3036633A
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US3044547A
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US3062760A
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US3219109A
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US3208525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |