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Patent US3772893A successfully refreshed from Google Patents.
US3772893A
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US
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Soil sealing method
Assignee: Dow Chemical Co
•
Filing: 1972-06-07
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Granted: 1973-11-20
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Expires: 1992-06-07
Abstract
Abstract A mixture of soil, expanding lattice clay and a linear water soluble organic polymer solid is compacted in an area desired to be sealed to provide an effective seal against water penetration.
Inventors
- 👤 L Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:12
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/16; Y; Y10; Y10S; Y10S106/00; Y10S106/90; Y10S106/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The method of claim 1 wherein the organic polymer has a molecular weight of at least about 1 million.
Claim 2
Dependent Claim
35 words
The method as defined in claim 1 wherein, in addition, a water-swellable organic polymer is admixed with said layer of soil in an amount up to about the amount of said water soluble linear polymer.
Claim 3
Dependent Claim
13 words
The method as defined in claim 1 wherein the organic polymer is anionic.
Claim 4
Dependent Claim
13 words
The method as defined in claim 1 wherein the organic polymer is nonionic.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein said organic polymer is present in an amount ranging from about 0.5 to about 3 percent of said lattice clay.
Claim 6
Dependent Claim
45 words
The method of claim 1 wherein said organic polymer is present in an amount ranging from about 0.5 to about 3 percEnt of said lattice clay and said lattice clay and organic polymer comprise from about 2 to about 10 percent of said soil solids.
Claim 7
Dependent Claim
31 words
The method of claim 7 wherein there is admixed with said soil solids a water-swellable organic polymer in an amount up to about the amount of said water soluble organic polymer.
Claim 8
Dependent Claim
21 words
The method of claim 8 wherein said water soluble organic polymer has a molecular weight of at least about 1 million.
References Cited (Backward Citations)
GB730550A
Cited
US3016713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |