US4040854A
Expired / Lapsed
US
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Methods of using cementing compositions having improved flow properties, containing phosphonobutane tricarboxylic acid
Assignee: ECC SPECIALTY CHEMICALS Inc
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Filing: 1976-04-14
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Granted: 1977-08-09
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Expires: 1996-04-14
Abstract
Abstract Methods of using aqueous hydraulic cement compositions containing phosphonobutane tricarboxylic acid as a flow-property-improving and turbulence-inducing additive are disclosed.
Inventors
- 👤 Leonard J. Persinski
- 👤 Fred David Martin
- 👤 Sally Lee Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/003; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 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 phosphonobutane tricarboxylic acid additive of the following formula: ##STR6## wherein R is independently selected from --H, ##STR7## provided that three R groups are ##STR8## and one R group is ##STR9##
Claim 2
Dependent Claim
86 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 phosphonobutane tricarboxylic acid additive of the following formula: ##STR6## wherein R is independently selected from --H, ##STR7## provided that three R groups are ##STR8## and one R group is ##STR9##
Claim 3
Dependent Claim
38 words
The method of claim 1 wherein said phosphonobutane tricarboxylic acid 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 4
Dependent Claim
14 words
The method of claim 1 wherein said phosphonobutane tricarboxylic acid is 2-phosphonobutane tricarboxylic acid-1,2,4.
Claim 5
Dependent Claim
103 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 phosphonobutane tricarboxylic acid additive of the following formula: ##STR10## wherein R is independently selected from --H, ##STR11## provided that three R groups are ##STR12## and one R group is ##STR13##
Claim 6
Dependent Claim
103 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 phosphonobutane tricarboxylic acid additive of the following formula: ##STR10## wherein R is independently selected from --H, ##STR11## provided that three R groups are ##STR12## and one R group is ##STR13##
Claim 7
Dependent Claim
38 words
The method of claim 4 wherein said phosphonobutane tricarboxylic acid 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 8
Dependent Claim
14 words
The method of claim 4 wherein said phosphonobutane tricarboxylic acid is 2-phosphonobutane tricarboxylic acid-1,2,4.
References Cited (Backward Citations)
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US3654151A
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US3657134A
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US3964921A
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |