Patent US2639217A successfully refreshed from Google Patents.
US2639217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sodium sesquicarbonate from crude trona
Assignee: Individual
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Filing: 1949-07-29
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Granted: 1953-05-19
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Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:30
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF SODIUM SESQUICARBONATE FROM CRUDE TRONA WHICH COMPRISES DISSOLVING THE TRONA IN A CIRCULATING SYSTEM OPEN TO THE ATMOSPHERE IN A RECIRCULATING SOLUTION OF SODIUM CARBONATE AND SODIUM BICARBONATE CONTAINING A GREATER CONCENTRATION OF THE NORMAL CARBONATE THAN OF THE BICARBONATE AT A TEMPERATURE NOT SUBSTANTIALLY LESS THAN THE BOILING POINT OF THE RECIRCULATING SOLUTION WITH CONSEQUENT SUBSTANTIAL LOSS OF CO2 FROM THE CIRCULATING SYSTEM, CRYSTALLIZING AND SEPARATING SODIUM SESQUICARBONATE BY COOLING, AND MAINTAINING THE RATIO OF CONCENTRATIONS OF SODIUM CARBONATE AND SODIUM BICARBONATE IN THE RECIRCULATING SOLUTION SUBSTANTIALLY CONSTANT BY WITHDRAWING FROM THE CIRCULATION THE STOICHIOMETRIC AMOUNT OF SOLUTION CORRESPONDING TO THE AMOUNT OF C02 LOST TO RESTORE THE DESIRED SODIUM CARBONATE TO SODIUM BICARBONATE CONCENTRATION, AND RECIRCULATING THE REMAINDER OF SAID SOLUTION OF SODIUM CARBONATE AND SODIUM BICARBONATE AND DISSOLVING MORE TRONA THEREIN.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PRODUCTION OF SODIUM SESQUICARBONATE FROM CRUDE TRONA WHICH COMPRISES DISSOLVING THE TRONA IN A CIRCULATING SYSTEM OPEN TO THE ATMOSPHERE IN A RECIRCULATING SOLUTION OF SODIUM CARBONATE AND SODIUM BICARBONATE CONTAINING A GREATER CONCENTRATION OF THE NORMAL CARBONATE THAN OF THE BICARBONATE AT A TEMPERATURE NOT SUBSTANTIALLY LESS THAN THE BOILING POINT OF THE RECIRCULATING SOLUTION WITH CONSEQUENT SUBSTANTIAL LOSS OF CO2 FROM THE CIRCULATING SYSTEM, CRYSTALLIZING AND SEPARATING SODIUM SESQUICARBONATE BY COOLING, AND MAINTAINING THE RATIO OF CONCENTRATIONS OF SODIUM CARBONATE AND SODIUM BICARBONATE IN THE RECIRCULATING SOLUTION SUBSTANTIALLY CONSTANT BY WITHDRAWING FROM THE CIRCULATION THE STOICHIOMETRIC AMOUNT OF SOLUTION CORRESPONDING TO THE AMOUNT OF C02 LOST TO RESTORE THE DESIRED SODIUM CARBONATE TO SODIUM BICARBONATE CONCENTRATION, AND RECIRCULATING THE REMAINDER OF SAID SOLUTION OF SODIUM CARBONATE AND SODIUM BICARBONATE AND DISSOLVING MORE TRONA THEREIN.
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |