Patent US2773739A successfully refreshed from Google Patents.
US2773739A
Expired / Lapsed
US
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Method of obtaining sodium bicarbonate
Assignee: Diamond Shamrock Corp
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Filing: 1953-01-30
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Granted: 1956-12-11
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Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Ward J Burkholder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:13
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/16; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF OBTAINING SODIUM BICARBONATE CRYSTALS OF A SIZE AND QUALITY COMPARABLE TO THOSE NORMALLY OBTAINED IN OPERATION OF THE AMMONIA-SODA PROCESS, WHICH INCLUDES THE STEP OF CARBONATING SODIUM CHLORIDE BRINE IN THE PRESENCE OF AN AMINE HAVING A BOILING POINT AT ATMOSPHERIC PRESSURE OF BETWEEN 100* AND 360* C. AND HAVING THE FORMULA NR1R2R3, WHEREIN R1R2 AND R3 ARE SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL CONTAINING FROM 2 TO 6 CARBON ATOMS, ALKANOLS CONTAINING FROM 2 TO 4 CARBON ATOMS, AND PRIMARY AMINOALKYL CONTAINING FROM 2 TO 4 CARBON ATOMS, AND WHERE NO MORE THAN TWO OF R1, R2 AND R3 ARE HYDROGEN, AT AN ELEVATED TEMPERATURE AND UNDER PRESSURE.
Claim 2
Independent Claim
115 words
THE METHOD OF OBTAINING SODIUM BICARBONATE CRYSTALS OF A SIZE AND QUALITY COMPARABLE TO THOSE NORMALLY OBTAINED IN OPERATION OF THE AMMONIA-SODA PROCESS, WHICH INCLUDES THE STEP OF CARBONATING SODIUM CHLORIDE BRINE IN THE PRESENCE OF AN AMINE HAVING A BOILING POINT AT ATMOSPHERIC PRESSURE OF BETWEEN 100* AND 360* C. AND HAVING THE FORMULA NR1R2R3, WHEREIN R1R2 AND R3 ARE SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL CONTAINING FROM 2 TO 6 CARBON ATOMS, ALKANOLS CONTAINING FROM 2 TO 4 CARBON ATOMS, AND PRIMARY AMINOALKYL CONTAINING FROM 2 TO 4 CARBON ATOMS, AND WHERE NO MORE THAN TWO OF R1, R2 AND R3 ARE HYDROGEN, AT AN ELEVATED TEMPERATURE AND UNDER PRESSURE.
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |