US2770524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pure sodium carbonate from wyoming trona
Assignee: FMC Corp
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Filing: 1951-08-02
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Granted: 1956-11-13
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Expires: 1971-08-02
Abstract
No abstract record available.
Inventors
- 👤 Max Y Seaton
- 👤 Kenneth B Ray
- 👤 Company The Stamford Trust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:56
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/12; C01D7/126; C01D7/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A CYCLIC PROCESS FOR PRODUCING SODA ASH OF HIGH PURITY FROM WYOMING TRONA, THE STEPS COMPRISING CALCINING TRONA AT A TEMPERATURE IN EXCESS OF 500* C., DISSOLVING THE CALCINED TRONA IN WATER AND RECYCLED MOTHER LIQUOR AT ABOUT 50*., FILTERING AND SUBSTANTIALLY REMOVING ALL OF THE ORGANIC COLORING MATTER BY AN ADSORBENT PRODUCING A WATER WHITE SOLUTION, SEPARATING THE LATTER SOLUTION FROM THE ADSORBENT, FLOWING THE SOLUTION THROUGH A PLURALITY OF HEATING AND EVAPORATING ZONES IN COUNTERCURRENT FLOW TO THE PASSAGE OF STEAM THERETHROUGH TO A FINAL HEATING ZONE HAVING A PRESSURE IN EXCESS OF ATMOS-
Claim 2
Dependent Claim
97 words
IN A CYCLIC PROCESS FOR PRODUCING SODA ASH OF HIGH PURITY FROM WYOMING TRONA, THE STEPS COMPRISING CALCINING TRONA AT A TEMPERATURE IN EXCESS OF 500* C., DISSOLVING THE CALCINED TRONA IN WATER AND RECYCLED MOTHER LIQUOR AT ABOUT 50*., FILTERING AND SUBSTANTIALLY REMOVING ALL OF THE ORGANIC COLORING MATTER BY AN ADSORBENT PRODUCING A WATER WHITE SOLUTION, SEPARATING THE LATTER SOLUTION FROM THE ADSORBENT, FLOWING THE SOLUTION THROUGH A PLURALITY OF HEATING AND EVAPORATING ZONES IN COUNTERCURRENT FLOW TO THE PASSAGE OF STEAM THERETHROUGH TO A FINAL HEATING ZONE HAVING A PRESSURE IN EXCESS OF ATMOS-
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |