Patent US3259471A successfully refreshed from Google Patents.
US3259471A
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Producing sodium sesquicarbonate using diatomaceous earth as a filter aid
Assignee: Stauffer Chemical Co
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Filing: 1963-03-25
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Granted: 1966-07-05
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Peter G Cortessis
- 👤 Frederick E Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:10
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/14; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS FOR PRODUCING SODIUM SESQUICARBONATE FROM TRONA ORE WHICH COMPRISES (1) GRINDING SAID ORE, (2) DISSOLVING THE SOLUBLE PORTION OF SAID GROUND ORE IN AN AQUEOUS MEDIA, (3) FILTERING THE RESULTANT SOLUTION TO REMOVE INSOLUBLES THEREFROM, (4) CRYSTALLIZING SODIUM SESQUICARBONATE FROM SAID FILTERED SOLUTION, (5) SEPARATING SAID CRYSTALS OF SODIUM SESQUICARBONATE FROM THE REMAINING SOLUTION AND (6) DRYING SAID CRYSTALS, THE IMPROVEMENT COMPRISING FILTERING SAID RESULTANT SOLUTION OF STEP (3) USING DIATOMACEOUS EARTH AS A FILTRATION AID AND MAINTAINING THE TEMPERATURE OF THE SODIUM CARBONATE SOLUTION AT LESS THAN APPROXIMATELY 150*F. WHILE IN CONTACT WITH THE DIATOMACEOUS EARTH.
Claim 2
Dependent Claim
100 words
IN A PROCESS FOR PRODUCING SODIUM SESQUICARBONATE FROM TRONA ORE WHICH COMPRISES (1) GRINDING SAID ORE, (2) DISSOLVING THE SOLUBLE PORTION OF SAID GROUND ORE IN AN AQUEOUS MEDIA, (3) FILTERING THE RESULTANT SOLUTION TO REMOVE INSOLUBLES THEREFROM, (4) CRYSTALLIZING SODIUM SESQUICARBONATE FROM SAID FILTERED SOLUTION, (5) SEPARATING SAID CRYSTALS OF SODIUM SESQUICARBONATE FROM THE REMAINING SOLUTION AND (6) DRYING SAID CRYSTALS, THE IMPROVEMENT COMPRISING FILTERING SAID RESULTANT SOLUTION OF STEP (3) USING DIATOMACEOUS EARTH AS A FILTRATION AID AND MAINTAINING THE TEMPERATURE OF THE SODIUM CARBONATE SOLUTION AT LESS THAN APPROXIMATELY 150*F. WHILE IN CONTACT WITH THE DIATOMACEOUS EARTH.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |