Patent US3491049A successfully refreshed from Google Patents.
US3491049A
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Low water-loss aqueous cement slurry and method of use
Assignee: Schlumberger Technology Corp
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Filing: 1965-10-13
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Granted: 1970-01-20
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Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Daniel L Gibson
- 👤 Clare H Kucera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:42
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/28; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C09K8/467; C09K8/487; C04B2103/00; C04B2103/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2745815A
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US2993016A
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US3042612A
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US3042641A
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US3140269A
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US3053674A
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US3271307A
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US3240736A
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US3287145A
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |