Patent US2625384A successfully refreshed from Google Patents.
US2625384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining operation
Assignee: FMC Corp
•
Filing: 1949-07-01
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Granted: 1953-01-13
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Expires: 1969-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pike
- 👤 Max Y Seaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
E; E21; E21C; E21C41/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR RECOVERING SODIUM CARBONATE FROM TRONA BEDS, WHICH COMPRISES DRY MINING THE TRONA, INTRODUCING WATER AT SUBSTANTIALLY THE TEMPERATURE OF THE TRONA DEPOSIT INTO THE DRY MINED SECTIONS OF THE BED TO REMOVE RESIDUAL TRONA AFTER THE DRY MINING, BRINGING THE SOLUTION OF TRONA TO THE SURFACE, HEATING SAID SOLUTION AND DISSOLVING IN IT DRY MINED TRONA, AND PROCESSING TO PRODUCE SODIUM CARBONATE.
Claim 2
Dependent Claim
65 words
A PROCESS FOR RECOVERING SODIUM CARBONATE FROM TRONA BEDS, WHICH COMPRISES DRY MINING THE TRONA, INTRODUCING WATER AT SUBSTANTIALLY THE TEMPERATURE OF THE TRONA DEPOSIT INTO THE DRY MINED SECTIONS OF THE BED TO REMOVE RESIDUAL TRONA AFTER THE DRY MINING, BRINGING THE SOLUTION OF TRONA TO THE SURFACE, HEATING SAID SOLUTION AND DISSOLVING IN IT DRY MINED TRONA, AND PROCESSING TO PRODUCE SODIUM CARBONATE.
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) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |