US2803555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light weight well cement
Assignee: ConocoPhillips Co
•
Filing: 1953-10-21
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Granted: 1957-08-20
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Expires: 1973-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Roscoe C Clark
- 👤 Henry F Coffer
- 👤 D Arcy A Shock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B38/00; C04B38/009; C09K8/467; C09K8/473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
PORTLAND CEMENT SLURRY HAVING A MAXIMUM DENSITY OF 111/2 LBS. PER GALLON WHEN SUBJECTED TO HYDROSTATIC PRESSURE OF 2000 P.S.I.G., WHEREIN THE CURED CEMENT DERIVED THEREFROM, BY CURSING 24 HOURS AT 100*F., HAS A MINICEMENT AND A UNICELLULAR CERAMIC AGGREGATE, HAVING AN CEMENT AND A UNICELLULAR CERAMIC AGGREGATE, HAVING AN ABSOLUTE APPARENT SPECIFIC GRAVITY OF LESS THAN ONE, IS SPHERICAL, AND HAS A MAXIMUM DIAMETER IN THE RANGE OF FROM .001 TO .25 INCH, WHICH WILL WITHSTAND A HYDEOSTATIC CRUSHING LOAD OF AT LEAST 2000 P.S.I., AND IN WHICH SUBSTANTIALLY ALL THE PASSAGE THROUGH THE WALLS SURROUNDING THE MAJOR PORTION OF THE ENCLOSED VOIDS HAVE AN EFFECTIVE DIAMETER OF LESS THAN 3 MICRONS FROM 2% TO 150%; WATER 50% TO 150%; AND A GELATINIZING CLAY FROM .2% TO 6%, SAID PERCENTAGES BEING BY WEIGHT BASED ON THE AMOUNT OF THE DRY PORTLAND CEMENT.
Claim 2
Dependent Claim
143 words
PORTLAND CEMENT SLURRY HAVING A MAXIMUM DENSITY OF 111/2 LBS. PER GALLON WHEN SUBJECTED TO HYDROSTATIC PRESSURE OF 2000 P.S.I.G., WHEREIN THE CURED CEMENT DERIVED THEREFROM, BY CURSING 24 HOURS AT 100*F., HAS A MINICEMENT AND A UNICELLULAR CERAMIC AGGREGATE, HAVING AN CEMENT AND A UNICELLULAR CERAMIC AGGREGATE, HAVING AN ABSOLUTE APPARENT SPECIFIC GRAVITY OF LESS THAN ONE, IS SPHERICAL, AND HAS A MAXIMUM DIAMETER IN THE RANGE OF FROM .001 TO .25 INCH, WHICH WILL WITHSTAND A HYDEOSTATIC CRUSHING LOAD OF AT LEAST 2000 P.S.I., AND IN WHICH SUBSTANTIALLY ALL THE PASSAGE THROUGH THE WALLS SURROUNDING THE MAJOR PORTION OF THE ENCLOSED VOIDS HAVE AN EFFECTIVE DIAMETER OF LESS THAN 3 MICRONS FROM 2% TO 150%; WATER 50% TO 150%; AND A GELATINIZING CLAY FROM .2% TO 6%, SAID PERCENTAGES BEING BY WEIGHT BASED ON THE AMOUNT OF THE DRY PORTLAND CEMENT.
References Cited (Backward Citations)
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Cited
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US2285302A
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US2340194A
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US2695669A
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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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |