US3135501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ potassium chloride recovery by selective solution
Assignee: PPG Industries Inc
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Filing: 1962-05-01
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Granted: 1964-06-02
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Expires: 1982-05-01
Abstract
No abstract record available.
Inventors
- 👤 Dahms James Bowen
- 👤 Edmonds Byron Priestly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:18
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/28; E21B43/281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PROCESS OF SELECTIVELY EXTRACTING POTASSIUM CHLORIDE FROM A SUBTERRANEAN DEPOSIT CONTAINING POTASSIUM CHLORIDE AND SODIUM CHLORIDE, THE IMPROVEMENT WHICH COMPRISES FEEDING TO SAID DEPOSIT A SATURATED AQUEOUS SOLUTION OF SODIUM CHLORIDE WHILE ABOVE ABOUT 100* F. AND CONTAINING FROM 0.0001 TO 1.0 GRAM-MOLES OF THE HEAVY METAL ION OF A SALT OF A HEAVY METAL FROM THE CLASS CONSISTING OF GROUPS IV (A), V (A), VIII AAND II (B) OF THE PERIODIC CHART OF ELEMENTS PER 100 GRAMS OF WATER IN SAID AQUEOUS SOLUTION, REMOVING POTASSIUM CHLO-
Claim 2
Dependent Claim
89 words
IN THE PROCESS OF SELECTIVELY EXTRACTING POTASSIUM CHLORIDE FROM A SUBTERRANEAN DEPOSIT CONTAINING POTASSIUM CHLORIDE AND SODIUM CHLORIDE, THE IMPROVEMENT WHICH COMPRISES FEEDING TO SAID DEPOSIT A SATURATED AQUEOUS SOLUTION OF SODIUM CHLORIDE WHILE ABOVE ABOUT 100* F. AND CONTAINING FROM 0.0001 TO 1.0 GRAM-MOLES OF THE HEAVY METAL ION OF A SALT OF A HEAVY METAL FROM THE CLASS CONSISTING OF GROUPS IV (A), V (A), VIII AAND II (B) OF THE PERIODIC CHART OF ELEMENTS PER 100 GRAMS OF WATER IN SAID AQUEOUS SOLUTION, REMOVING POTASSIUM CHLO-
References Cited (Backward Citations)
US2161800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |