Patent US3145774A successfully refreshed from Google Patents.
US3145774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement for wells
Assignee: ExxonMobil Oil Corp
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Filing: 1963-01-17
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Granted: 1964-08-25
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Expires: 1983-01-17
Abstract
No abstract record available.
Inventors
- 👤 Freeman D Patchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:03
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B28/00; C04B28/02; C04B28/04; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C09K8/50; C09K8/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A SLURRY COMPRISING A WATER-IN-OIL EMULSION AS THE ENTIRE LIQUID PHASE OF SAID SLURRY, SAID EMULSION CONTAINING BETWEEN 10 AND 75 PERCENT BY VOLUME OF OIL, AN EMULSIFIER FOR WATER-IN-OIL EMULSION IN AN AMOUNT SUFFICIENT TO EFFECT A TEMPORARY EMULSIFICATION IN SAID WATERIN-OIL EMULSION BUT NOT TO EXCEED 10 PERCENT BY WEIGHT OF SAID EMULSION, A HYDRAULIC CEMENT AND FINELY GROUND SILICA, THE AMOUNT OF SAID WATER-IN-OIL EMULSION IN SAID SLURRY BEING BETWEEN 30 TO 70 PARTS TO 100 PARTS BY WEIGHT OF SAID HYDRAULIC CEMENT AND FINLY GROUND SILICA COMBINED, SAID FINELY GROUND SILICA BEING CAPABLE OF PASSING THROUGH A 100-MESH SCREEN AND BEING IN AN AMOUNT BETWEEN 20 AND 200 PERCENT BY WEIGHT OF SAID HYDRAULIC CEMENT EFFECTIVE TO REDUCE THE FLUID LOSS AND INCREASE THE SETTING TIME OF SAID SLURRY AND TO INCREASE THE INITIAL COMPRESSIVE STRENGTH OF SAID CEMENT.
Claim 2
Dependent Claim
143 words
A SLURRY COMPRISING A WATER-IN-OIL EMULSION AS THE ENTIRE LIQUID PHASE OF SAID SLURRY, SAID EMULSION CONTAINING BETWEEN 10 AND 75 PERCENT BY VOLUME OF OIL, AN EMULSIFIER FOR WATER-IN-OIL EMULSION IN AN AMOUNT SUFFICIENT TO EFFECT A TEMPORARY EMULSIFICATION IN SAID WATERIN-OIL EMULSION BUT NOT TO EXCEED 10 PERCENT BY WEIGHT OF SAID EMULSION, A HYDRAULIC CEMENT AND FINELY GROUND SILICA, THE AMOUNT OF SAID WATER-IN-OIL EMULSION IN SAID SLURRY BEING BETWEEN 30 TO 70 PARTS TO 100 PARTS BY WEIGHT OF SAID HYDRAULIC CEMENT AND FINLY GROUND SILICA COMBINED, SAID FINELY GROUND SILICA BEING CAPABLE OF PASSING THROUGH A 100-MESH SCREEN AND BEING IN AN AMOUNT BETWEEN 20 AND 200 PERCENT BY WEIGHT OF SAID HYDRAULIC CEMENT EFFECTIVE TO REDUCE THE FLUID LOSS AND INCREASE THE SETTING TIME OF SAID SLURRY AND TO INCREASE THE INITIAL COMPRESSIVE STRENGTH OF SAID CEMENT.
References Cited (Backward Citations)
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |