US3922172A
Expired / Lapsed
US
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High-alumina cement
Assignee: Schlumberger Technology Corp
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Filing: 1974-01-07
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Granted: 1975-11-25
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Expires: 1994-01-07
Abstract
Abstract A high-alumina cement composition is disclosed which has thermal stability over a wide temperature range and which develops strength at an early age. The cement composition comprises a high-alumina cement, a halide salt and calcium sulfate. This composition when added to water provides a hydraulic cement composition which can be employed in environments subject to wide temperature fluctuations below and above freezing (e.g. 32*F).
Inventors
- 👤 Oliver W Crinkelmeyer
- 👤 Earl F Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A HYDRAULIC CEMENT COMPOSITION COMPRISING, AS PERCENT BY WEIGHT: A. A HIGH-ALUMINA CEMENT, B. CALCIUM SULFATE FROM ABOUT 5 TO ABOUT 30 PERCENT, BASED ON THE WEIGHT OF HIGH-ALUMINA CEMENT, C. WATER, FROM ABOUT 35 TO ABOUT 50 PERCENT BASED ON THE TOTAL WEIGHT OF (A) AND (B) , AND D. A HALIDE SALT SELECTED FROM THE GROUP CONSISTING OF NACI, KCI, FROM ABOUT 5 TO ABOUT 15 PERCENT, BASED ON THE WEIGHT OF WATER.
Claim 2
Dependent Claim
75 words
A HYDRAULIC CEMENT COMPOSITION COMPRISING, AS PERCENT BY WEIGHT: A. A HIGH-ALUMINA CEMENT, B. CALCIUM SULFATE FROM ABOUT 5 TO ABOUT 30 PERCENT, BASED ON THE WEIGHT OF HIGH-ALUMINA CEMENT, C. WATER, FROM ABOUT 35 TO ABOUT 50 PERCENT BASED ON THE TOTAL WEIGHT OF (A) AND (B) , AND D. A HALIDE SALT SELECTED FROM THE GROUP CONSISTING OF NACI, KCI, FROM ABOUT 5 TO ABOUT 15 PERCENT, BASED ON THE WEIGHT OF WATER.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein the halide salt is NaCl.
Claim 4
Dependent Claim
54 words
The composition of claim 1 wherein the calcium sulfate is present in an amount ranging from about 20 to about 25 percent, the water is present in an amount ranging from about 38 to about 44 percent, and the halide salt is present in an amount ranging from about 8 to about 12 percent.
Claim 5
Dependent Claim
11 words
The composition of claim 3 wherein the halide salt is NaCl.
References Cited (Backward Citations)
US3600203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |