US3248182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of sodium sesquicarbonate in presence of a surfactant and a hydrocarbon oil
Assignee: Intermountain Research and Development Corp
•
Filing: 1962-11-21
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Granted: 1966-04-26
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 John F Herink
- 👤 Richard W Waggener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:40
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE PREPARATION OF SODIUM SESQUICARBONATE CRYSTALS HAVING A HIGH BULK DENSITY AND A HIGH PRCENTAGE OF +100 MESH CRYSTALS WHICH COMPRISES CRYSTALLIZING SODIUM SESQUICARBONATE FROM A SATURATED AQUEOUS TRONA SOLUTION IN THE PRESENCE OF ABOUT 5 TO 400 PARTS PER MILLION OF A MIXTURE OF AN ANIONIC ORGANIC SURFACTANT CAPABLE OF ADSORBING ON SODIUM SESQUICARBONATE CRYSTALS AND A HYDROCARBON OIL CONTAINING ESSENTIALLY ONLY HYDROGEN AND CARBON HAVING A BOILING POINT OF ABOUT 80*C. TO ABOUT 400*C. THE WEIGHT RATIO OF SURFACTANT TO OIL BEING ABOUT 1:1 TO 20:1 PROVIDED THAT THE OIL CONCENTRATON IS AT LEAST 2.5 P.PM., AND RECOVERING THE SODIUM SESQUICARBONATE CRYSTALS.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE PREPARATION OF SODIUM SESQUICARBONATE CRYSTALS HAVING A HIGH BULK DENSITY AND A HIGH PRCENTAGE OF +100 MESH CRYSTALS WHICH COMPRISES CRYSTALLIZING SODIUM SESQUICARBONATE FROM A SATURATED AQUEOUS TRONA SOLUTION IN THE PRESENCE OF ABOUT 5 TO 400 PARTS PER MILLION OF A MIXTURE OF AN ANIONIC ORGANIC SURFACTANT CAPABLE OF ADSORBING ON SODIUM SESQUICARBONATE CRYSTALS AND A HYDROCARBON OIL CONTAINING ESSENTIALLY ONLY HYDROGEN AND CARBON HAVING A BOILING POINT OF ABOUT 80*C. TO ABOUT 400*C. THE WEIGHT RATIO OF SURFACTANT TO OIL BEING ABOUT 1:1 TO 20:1 PROVIDED THAT THE OIL CONCENTRATON IS AT LEAST 2.5 P.PM., AND RECOVERING THE SODIUM SESQUICARBONATE CRYSTALS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |