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Patent US3554287A successfully refreshed from Google Patents.
US3554287A
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US
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Gelable composition, resulting gelled polymer composition and use thereof
Assignee: Dow Chemical Co
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Filing: 1966-11-07
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Granted: 1971-01-12
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Expires: 1986-11-07
Abstract
Abstract A fluid gelable composition, which sets autonomously to a waterswellable resilient solid, comprising: A. a sufficiently water-soluble salt of a selected, metal in a specified minimum amount; B. water in an amount sufficient to make 100 parts by weight of water and said salt; C. a selected water-dispersible synthetic polymer in an amount sufficient to yield a gel with said brine, said gel being as in ASTM D 555-58 and method of use of said composition to provide a fluidtight seal in underground passageways including the space between the exposed face of a geologic formation and a well casing, tunnel, shaft, or retaining wall.
Inventors
- 👤 Louis H Eilers
- 👤 Christ F Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:24
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/10; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/512; E; E21; E21D; E21D5/00; E21D5/012; Y; Y10; Y10S; Y10S507/00; Y10S507/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
water in sufficient amount to make 100 parts by weight of brine with said water-soluble salt;
Claim 2
Dependent Claim
136 words
a selected water-dispersible synthetic polymer in an amount sufficient to provide between about 3 pounds and about 6 pounds of polymer per gallon of brine to yield a gel with said brine, said gel being defined by the standard test designated ASTM D555-58, said synthetic polymer being selected from the class consisting of polymerized homopolymers of sodium styrenesulfonate, vinylpyrrolidone, ethylene oxide, vinylmorpholinone, mixtures thereOf, and copolymers consisting of at least one monomer selected from the class above and vinyl acetate copolymerized with at least one other monomer selected from the class consisting of maleic anhydride and maleic half amides, and B. maintaining said composition in place for a time sufficient for it to set so emplaced to said water-swellable resilient solid to provide a seal against the passage of water and aqueous solutions through said opening.
References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |