US3583167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plugging of permeable materials
Assignee: Dow Chemical Co
•
Filing: 1969-05-08
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Granted: 1971-06-08
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Expires: 1989-05-08
Abstract
Abstract A method is provided for plugging permeable materials, preferably permeable earthen materials. An aqueous solution containing dispersed therein an organic material having an acid reaction is reacted with an acidic aqueous solution containing multivalent metal cations dispersed therein which form a precipitate with the organic material, in situ in the permeable material to form a precipitate, thus reducing the permeability of the material.
Inventors
- 👤 Christ F Parks
- 👤 James E Goddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:00
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/32; C09K17/40; C09K17/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
The method of claim 1 wherein the permeable material is earthen strata.
Claim 2
Dependent Claim
19 words
The method of claim 2 wherein the acidic aqueous solution comprises acid mine waters containing multivalent cations dispersed therein.
References Cited (Backward Citations)
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US2439833A
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US2874545A
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US3291212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |