US3587737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of salt water encroachment into fresh water aquifers
Assignee: Marathon Oil Co
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Filing: 1969-11-05
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Granted: 1971-06-28
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Expires: 1989-11-05
Abstract
Abstract THE ADVANCE OF SALINE WATER INTO FRESH WATER AQUIFERS IS INHIBITED BY INJECTING INTO THE AQUIFER, PREFERABLY IN ADVANCE OF THE INTRUDING SALT WATER, A MICELLAR SOLUTION COMPRISING PREFERABLY A LOW EQUIVALENT WEIGHT PETROLEUM SULFONATE. SUCH A MICELLAR SOLUTION, INTER ALIA, BECOMES VISCOUS UPON CONTACT WITH SALINE WATER AND INHIBITS THE FURTHER ENCROACHMENT OF ADDITIONAL SALINE WATER.
Inventors
- 👤 William C Tosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:06
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |