US4036660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of using cementing compositions having improved flow properties, containing sulfonated copolymers of styrene-maleic anhydride
Assignee: ECC SPECIALTY CHEMICALS Inc
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Filing: 1976-04-14
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Granted: 1977-07-19
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Expires: 1996-04-14
Abstract
Abstract Methods of using aqueous hydraulic cement compositions containing sulfonated copolymers of styrene-maleic anhydride as flow-property-improving and turbulence-inducing additives are disclosed.
Inventors
- 👤 Leonard J. Persinski
- 👤 Fred David Martin
- 👤 Sally Lee Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:55
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/20; C04B24/22; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
In a method of subjecting an aqueous hydraulic cement slurry to flow for the purpose of handling or transporting said slurry, the improvement comprising adding to said slurry, prior to subjecting said slurry to flow, from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement on a dry basis, of a copolymer of randomly repeating units of the following formulas: ##STR2## where M is hydrogen, ammonium or alkali metal ion, and n is an integer of 1 to 3.
Claim 2
Dependent Claim
84 words
In a method of subjecting an aqueous hydraulic cement slurry to flow for the purpose of handling or transporting said slurry, the improvement comprising adding to said slurry, prior to subjecting said slurry to flow, from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement on a dry basis, of a copolymer of randomly repeating units of the following formulas: ##STR2## where M is hydrogen, ammonium or alkali metal ion, and n is an integer of 1 to 3.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the copolymer has a molecular weight of from 3,000 to 10,000.
Claim 4
Dependent Claim
36 words
The method of claim 1 wherein said copolymer is added to said slurry in an amount of from about 0.1 to about 2.0 percent by weight, based on weight of hydraulic cement on a dry basis.
Claim 5
Dependent Claim
101 words
In the method of wet processing cement, comprising the steps of subjecting an aqueous slurry of hydraulic cement precursor solids to flow for the purpose of mixing and transporting said slurry, followed by kiln heating of said slurry, the improvement comprising adding to said slurry, prior to subjecting said slurry to flow, from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement on a dry basis, of a copolymer of randomly repeated units of the following formulas: ##STR3## where M is hydrogen, ammonium or alkali metal ion, and n is an integer of 1 to 3.
Claim 6
Dependent Claim
101 words
In the method of wet processing cement, comprising the steps of subjecting an aqueous slurry of hydraulic cement precursor solids to flow for the purpose of mixing and transporting said slurry, followed by kiln heating of said slurry, the improvement comprising adding to said slurry, prior to subjecting said slurry to flow, from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement on a dry basis, of a copolymer of randomly repeated units of the following formulas: ##STR3## where M is hydrogen, ammonium or alkali metal ion, and n is an integer of 1 to 3.
Claim 7
Dependent Claim
21 words
The method of claim 4 wherein the molecular weight of the copolymer added to said slurry is from 3,000 to 10,000.
Claim 8
Dependent Claim
36 words
The method of claim 4 wherein said copolymer is added to said slurry in an amount of from about 0.1 to about 2.0 percent by weight, based on weight of hydraulic cement on a dry basis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |