Patent US3774402A successfully refreshed from Google Patents.
US3774402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic seal for salt water ponds
Assignee: Occidental Petroleum Corp
•
Filing: 1971-07-16
•
Granted: 1973-11-27
•
Expires: 1991-07-16
Abstract
Abstract A technique is provided for reducing hydraulic leakage from earthen solar brine concentration ponds by application of a layer of phosphate slimes in an amount in the range of from about 1 to 3 pounds per square foot to the bottom of the pond for reducing permeability of the earth. Preferably the phosphate slimes are applied by pumping in a thin slurry of phosphate slimes which are then permitted to settle. A portion of the slimes may be mixed with underlying earth, if desired. Preferably a permanent layer of precipitated salts is built up over the layer of phosphate slimes.
Inventors
- 👤 P Muzychenko
- 👤 G Mallan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:17
CPC Classifications
E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/18; E02B; E02B3/00; E02B3/04; E02B3/12; F; F24; F24S; F24S10/00; F24S10/10; F24S10/13; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A method as defined in claim 1 wherein the setp of applying comprises applying a Slurry of phosphate slimes in an amount in the range of from about one to three pounds of dry weight of slimes per square foot of pond surface.
Claim 2
Dependent Claim
48 words
A method as defined in claim 2 wherein the step of applying comprises pumping a slurry of phosphate slimes in water into the pond and settling the solids from the slurry to build up a layer, at least a portion of which is infiltrated into the surrounding earth.
Claim 3
Dependent Claim
25 words
A method as defined in claim 2 further comprising the step of building up a layer of solid salts over the layer of phosphate slimes.
Claim 4
Dependent Claim
30 words
A method as defined in claim 1 wherein the step of applying includes mixing the slurry of phosphate slimes with a portion of earth on the bottom of the pond.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |