US3839262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementitious compositions and methods
Assignee: Dow Chemical Co
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Filing: 1972-11-21
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Granted: 1974-10-01
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Expires: 1992-11-21
Abstract
Abstract The sealing of void spaces, e.g., as in geological formations and/or between metal shapes is accomplished with a liquid slurry of a particulate, water-soluble organic polymer in an organo solvent. The mixture of the polymer and solvent has a controlled set time to allow the emplacement of the slurry as a liquid. The slurry then sets to form a sealing cementitious material.
Inventors
- 👤 L Eilers
- 👤 C Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:12
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C09; C09K; C09K8/00; C09K8/42; C09K8/44; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/516
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A COMPOSITION OF MATTER WHICH COMPRISES A LIQUID SLURRY OF (A) FROM ABOUT 0.1 TO ABOUT 2 PARTS BY WEIGHT OF A WATERSOLUBLE CARBAMOYL POLYMER PER PART BY WEIGHT OF A LIQUID, GEL FORMING ORGANO SOLVENT THEREFOR COMPOSED OF A LIQUID ORGANIC NON-SOLVENT FOR THE POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE GLYCOL, WATER-MISCIBLE ALKYLENE OXIDE POLYMERS HAVING MOLECULAR WEIGH UP TO ABOUT 600 AND WATERMISCIBLE ALKYL AND ARYL ETHERS OF THE POLYMERS WHEREIN THE ETHERIFYING MOIETY CONTAINS FROM ONE TO 12 CARBONS AND (B) AT LEAST ABOIT 0.05 PARTS BY WEIGHT PER PART BY WEIBHT OF THE NON-SOLVENT, OF AN ORGANIC SOLVENT FOR THE POLYMER, THE AMOUNT OF THE LATTER BEING SUFFICIENT TO RENDER THE LIQUID MIXTURE A SOLVENT FOR THE POLYMER, SAID ORGANIC SOLVENT BEING DIMETHYLFORMAMIDE.
Claim 2
Dependent Claim
129 words
A COMPOSITION OF MATTER WHICH COMPRISES A LIQUID SLURRY OF (A) FROM ABOUT 0.1 TO ABOUT 2 PARTS BY WEIGHT OF A WATERSOLUBLE CARBAMOYL POLYMER PER PART BY WEIGHT OF A LIQUID, GEL FORMING ORGANO SOLVENT THEREFOR COMPOSED OF A LIQUID ORGANIC NON-SOLVENT FOR THE POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE GLYCOL, WATER-MISCIBLE ALKYLENE OXIDE POLYMERS HAVING MOLECULAR WEIGH UP TO ABOUT 600 AND WATERMISCIBLE ALKYL AND ARYL ETHERS OF THE POLYMERS WHEREIN THE ETHERIFYING MOIETY CONTAINS FROM ONE TO 12 CARBONS AND (B) AT LEAST ABOIT 0.05 PARTS BY WEIGHT PER PART BY WEIBHT OF THE NON-SOLVENT, OF AN ORGANIC SOLVENT FOR THE POLYMER, THE AMOUNT OF THE LATTER BEING SUFFICIENT TO RENDER THE LIQUID MIXTURE A SOLVENT FOR THE POLYMER, SAID ORGANIC SOLVENT BEING DIMETHYLFORMAMIDE.
Claim 3
Dependent Claim
13 words
A composition as in claim 1 wherein the carbamoyl polymer is a polyacrylamide.
Claim 4
Dependent Claim
14 words
A composition as in claim 1 wherein the carbamoyl is a styrene maleamide copolymer.
Claim 5
Dependent Claim
36 words
A composition as in claim 1 wherein the carbamoyl polymer is characterized by an ethylenically polymerized polyalkane backbone in which at least about 25 mole percent of the polymerized mers have substituent groups of the formula:
Claim 6
Dependent Claim
26 words
A composition as in claim 1 wherein the amount of organo solvent is controlled in relation to the organo non-solvent to provide a predetermined set time.
Claim 7
Dependent Claim
21 words
A composition as in claim 1 and including a finely divided solid oxide, hydroxide or a salt of a polyvalent metal.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |