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Patent US4380408A successfully refreshed from Google Patents.
US4380408A
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Stabilizing clay soil with dry hydroxy-aluminum
Assignee: Chevron USA Inc
•
Filing: 1981-07-09
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Granted: 1983-04-19
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Expires: 2001-07-09
Abstract
Abstract A method of stabilizing clay soil comprising admixing the clay soil with an effective amount of dry hydroxy-aluminum.
Inventors
- 👤 Tor Loken
- 👤 Odd R. Bryhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:45
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/02; C09K17/04; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
18 words
A method of stabilizing clay soil comprising admixing the clay soil with an effective amount of dry hydroxy-aluminum.
Claim 2
Independent Claim
18 words
A method of stabilizing clay soil comprising admixing the clay soil with an effective amount of dry hydroxy-aluminum.
Claim 3
Dependent Claim
22 words
The method of claim 1 where at least 2.5 grams of hydroxy-aluminum per 100 grams clay soil wet weight is admixed therewith.
Claim 4
Dependent Claim
22 words
The method of claim 1 where at least 15 grams of hydroxy-aluminum per 100 grams clay soil wet weight is admixed therewith.
Claim 5
Dependent Claim
43 words
The method of claim 1 where the hydroxy-aluminum has the general formula Al(OH) n X 3-n where n has a value of at least 2.0 and X is an anion selected from the group consisting of chloride, bromide, iodide, nitrate, sulfate and acetate.
Claim 6
Dependent Claim
43 words
The method of claim 1 where the hydroxy-aluminum has the general formula Al(OH) n X 3-n where n has a value of at least 2.5 and X is an anion selected from the group consisting of chloride, bromide, iodide, nitrate, sulfate and acetate.
Claim 7
Dependent Claim
11 words
The method of claim 1 where the hydroxy-aluminum is hydroxy-aluminum chloride.
Claim 8
Independent Claim
64 words
The method of stabilizing a clay containing soil deposit by forming a plurality of pillars extending into said formation comprising the steps of selecting the size of pillars to be formed, determining the wet weight of the clay within said pillars and mixing at least 2.5 grams of dry hydroxy-aluminum per 100 grams wet weight of clay with said clay to form said pillars.
Claim 9
Independent Claim
64 words
The method of stabilizing a clay containing soil deposit by forming a plurality of pillars extending into said formation comprising the steps of selecting the size of pillars to be formed, determining the wet weight of the clay within said pillars and mixing at least 2.5 grams of dry hydroxy-aluminum per 100 grams wet weight of clay with said clay to form said pillars.
Claim 10
Dependent Claim
25 words
The method of claim 7 where at least 15 grams of hydroxy-aluminum per 100 grams of clay soil wet weight is mixed with said clay.
Claim 11
Dependent Claim
21 words
The method of claim 7 further characterized in that hydroxy-aluminum is admixed with said clay soil in situ in said deposit.
References Cited (Backward Citations)
US3603399A
Cited
US3833718A
Cited
US3827500A
Cited
US3827495A
Cited
US3980490A
Cited
US3980489A
Cited
US4136992A
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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) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |