US2880096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement compositions and process of cementing wells
Assignee: Phillips Petroleum Co
•
Filing: 1954-12-06
•
Granted: 1959-03-31
•
Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 James R Hurley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:52
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/24; C04B24/38; C04B24/383; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CEMENT COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A DRY HYFRAULIC CEMENT MIXED WITH MINOR WEIGHT PERCENTAGES OF THE WEIGHT OF SAID DRY HYDRAULIC CEMENT OF 0.1 TO 10% OF A CEMENT THICKENING TIME EXTENDING AND WATER LOSS REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ACID CARBOXALKYL HYDROXYETHYL CELLULOSE MIXED ETHERS IN WHICH THE ALKYL GROUP CONTAINS ONE TO TWO CARBON ATOMS, THE TOTAL SUBSSTITUTION PER ANHYDROGLUCOSE UNIT OF THE CELLULOSE OF CARBOXYALKYL AND HYDROXYETHYL GROUPS IS BETWEEN 0.5 TO 1.75 THE HYDROXYALKYL SUBSTITUTION IS FROM 0.15 TO 1.2, AND SALTS OF SAID MIXED ETHERS, AND 0.3 TO 10% OF A CEMENT THICKENING TIME REDUCING AGENT HAVING SUBSTANTIALLY NO EFFECT ON SAID WATER LOSS CONSISTING OF AN ALKALI METAL ALUMINATE.
Claim 2
Dependent Claim
123 words
A CEMENT COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A DRY HYFRAULIC CEMENT MIXED WITH MINOR WEIGHT PERCENTAGES OF THE WEIGHT OF SAID DRY HYDRAULIC CEMENT OF 0.1 TO 10% OF A CEMENT THICKENING TIME EXTENDING AND WATER LOSS REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ACID CARBOXALKYL HYDROXYETHYL CELLULOSE MIXED ETHERS IN WHICH THE ALKYL GROUP CONTAINS ONE TO TWO CARBON ATOMS, THE TOTAL SUBSSTITUTION PER ANHYDROGLUCOSE UNIT OF THE CELLULOSE OF CARBOXYALKYL AND HYDROXYETHYL GROUPS IS BETWEEN 0.5 TO 1.75 THE HYDROXYALKYL SUBSTITUTION IS FROM 0.15 TO 1.2, AND SALTS OF SAID MIXED ETHERS, AND 0.3 TO 10% OF A CEMENT THICKENING TIME REDUCING AGENT HAVING SUBSTANTIALLY NO EFFECT ON SAID WATER LOSS CONSISTING OF AN ALKALI METAL ALUMINATE.
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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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |