US3050290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering sodium values by solution mining of trona
Assignee: FMC Corp
•
Filing: 1959-10-30
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Granted: 1962-08-21
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Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Ned A Caldwell
- 👤 William R Frint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/28; E21B43/281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF RECOVERING SODIUM VALUES FROM AN UNDERGROUND TRONA FORMATION WHICH COMPRISES CIRCULATING A SOLVENT FOR TRONA THROUGH THE FORMATION, REMOVING THE TRONA SOLUTION FROM THE FORMATION, REHEATING AND RECYCLING ALL OF SAID SOLUTION THROUGH THE TRONA FORMATION UNTIL
Claim 2
Independent Claim
40 words
THE METHOD OF RECOVERING SODIUM VALUES FROM AN UNDERGROUND TRONA FORMATION WHICH COMPRISES CIRCULATING A SOLVENT FOR TRONA THROUGH THE FORMATION, REMOVING THE TRONA SOLUTION FROM THE FORMATION, REHEATING AND RECYCLING ALL OF SAID SOLUTION THROUGH THE TRONA FORMATION UNTIL
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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |