Patent US3748159A successfully refreshed from Google Patents.
US3748159A
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High temperature cementing compositions containing a lignosulfonic acid salt and a pentaboric acid salt
Assignee: Halliburton Co
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Filing: 1972-04-20
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Granted: 1973-07-24
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Expires: 1992-04-20
Abstract
Abstract THIS SPECIFICATION DISCLOSES ADDITIVES FOR RETARDING THE SETTLING TIME OF CEMENT COMPOSITIONS AT HIGH TEMPERATURES WHICH ARE BASICALLY COMPRISED OF MIXTURES OF A LIGNOSULFONIC ACID SALT AND A PENTABORIC ACID SALT, NOVEL CEMENT COMPOSITONS CONTAINING THE ADDITIVES AND METHODS OF CEMENTING HIGH TEMPERATURE WELL FORMATIONS EMPOLYING THE CEMENT COMPOSITIONS.
Inventors
- 👤 C George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:22
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C09; C09K; C09K8/00; C09K8/42; C09K8/46; E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |