Patent US3839260A successfully refreshed from Google Patents.
US3839260A
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 15:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C09K8/42; C09K8/44; C09K8/516
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A COMPOSITION OF MATTER WHICH COMPRISES A LIQUID SLURRY A (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 THEREFO COMPOSED OF A LIQUID ORGANIC NON-SOLVENT FOR THE POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE GLYC9L, WATER-MISCIBLE ALKYLENE OXIDE POLYMERS HAVING MOLECULAR WIGHT UP TO ABOUT 600 AND WATERMISCIBLE ALKYL AND ARYL ETHERS OF THE POLYMERS WHEREIN THE ETHERIFYING MOIETY CPNTAINS FROM 1 TO 12 CARBONS AND (B) AT LEAST ABOUT 0.05 PART BY WEIGHT PER PART BY WEIGHT OF THE NON-SOLVENT, OF AN ORGANIC SOLVENT FOR THE POLYMER, THE AMOUNT OF THE LATTER BEING SUFFICINT OT RENDER THE LIQUID MIXTURE A SOLVENT FOR THE POLYMER, SAID ORGANIC SOLVENT BEING ACETIC ACID.
Claim 2
Dependent Claim
130 words
A COMPOSITION OF MATTER WHICH COMPRISES A LIQUID SLURRY A (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 THEREFO COMPOSED OF A LIQUID ORGANIC NON-SOLVENT FOR THE POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE GLYC9L, WATER-MISCIBLE ALKYLENE OXIDE POLYMERS HAVING MOLECULAR WIGHT UP TO ABOUT 600 AND WATERMISCIBLE ALKYL AND ARYL ETHERS OF THE POLYMERS WHEREIN THE ETHERIFYING MOIETY CPNTAINS FROM 1 TO 12 CARBONS AND (B) AT LEAST ABOUT 0.05 PART BY WEIGHT PER PART BY WEIGHT OF THE NON-SOLVENT, OF AN ORGANIC SOLVENT FOR THE POLYMER, THE AMOUNT OF THE LATTER BEING SUFFICINT OT RENDER THE LIQUID MIXTURE A SOLVENT FOR THE POLYMER, SAID ORGANIC SOLVENT BEING ACETIC ACID.
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 |