US3667236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating subsurface soils
Assignee: Dow Chemical Co
•
Filing: 1970-06-10
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Granted: 1972-06-06
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Expires: 1990-06-10
Abstract
Abstract A method is provided for increasing the stability of subsurface soils. A cavity in the subsoil is filled with a permeably consolidated aggregate and optionally clayey soils adjacent to the cavity are also treated with a clayey stabilizing chemical.
Inventors
- 👤 Robert B Rosene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:49
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A method for stabilizing load bearing clayey subsoil which comprises: a. sinking a treatment borehole into said subsoil; b. forming a cavity adjacent to said borehole at a predetermined depth in the subsoil; c. filling the cavity with a permeably consolidated aggregate; anD d. treating the clayey soil surrounding the cavity with a chemical stabilizing agent.
Claim 2
Dependent Claim
84 words
In the method of strengthening a subsurface formation containing water sensitive clay minerals consisting of placing a permeable aggregate mass in certain areas of said formation to provide both a non-water sensitive mass and a means for draining liquids from a portion of said formation the improvement which comprises: a. treating at least a portion of the formation surrounding said aggregate mass with a stabilizer for said clay minerals to render said minerals less sensitive to water, and b. permeably consolidating said aggregate mass.
Claim 3
Dependent Claim
20 words
The method of claim 3 including in addition providing drainage means connected to said aggregate mass for draining liquids therefrom.
References Cited (Backward Citations)
US1355066A
Cited
US1866826A
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US2659208A
Cited
US2767801A
Cited
US3151998A
Cited
US3386251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |