US2819221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for breaking petroleum emulsions employing certain carboxybutane esters
Assignee: Baker Petrolite LLC
•
Filing: 1954-08-06
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Granted: 1958-01-07
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Expires: 1974-08-06
Abstract
No abstract record available.
Inventors
- 👤 Smith Alvin Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:50
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C07; C07C; C07C69/00; C07C69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS OF BREAKING PETROLEUM EMULSIONS OF THE WATER-IN-OIL TYPE CHARACTERIZED BY SUBJECTING THE EMULSION TO A DEMULSIFYING AGENT INCLUDING AN ESTERIFIED COGENERIC MIXTURE OBTAINED BY A PROCESS INCLUDING THE STEP OF ESTERIFYING A POLYPROPYLENEGLYCOL HAVING A AVERAGE MOLECULAR WEIGHT OF AT LEAST 1600 AND NOT OVER 2700 WITH DIGLYCOLIC ACID AND TETRACARBOXY BUTANE ACID; THE MOLAL RATIO OF REACTANTS BEING ONE PART OF TETRACARBOXY BUTANE TO FOUR PARTS EACH OF POLYPROPYLENE GLYCOL AND DIGLYCCLIC ACID; SAID REACTION BEING CONDUCTED AT A TEMPERATURE SUFFICIENTLY HIGH TO EVOLVE WATER AND BELOW THE PYROLYSIS POINT OF REACTANTS AND REACTION PRODUCT WITH THE ELIMINATION THROUGH REACTION OF APPROXIMATELY TWO-THIRDS OF THE CARBOXYL RADICALS PRESENT AND SUBSTANTIALLY ALL THE HYDROXYL RADICALS PRESENT.
Claim 2
Dependent Claim
118 words
THE PROCESS OF BREAKING PETROLEUM EMULSIONS OF THE WATER-IN-OIL TYPE CHARACTERIZED BY SUBJECTING THE EMULSION TO A DEMULSIFYING AGENT INCLUDING AN ESTERIFIED COGENERIC MIXTURE OBTAINED BY A PROCESS INCLUDING THE STEP OF ESTERIFYING A POLYPROPYLENEGLYCOL HAVING A AVERAGE MOLECULAR WEIGHT OF AT LEAST 1600 AND NOT OVER 2700 WITH DIGLYCOLIC ACID AND TETRACARBOXY BUTANE ACID; THE MOLAL RATIO OF REACTANTS BEING ONE PART OF TETRACARBOXY BUTANE TO FOUR PARTS EACH OF POLYPROPYLENE GLYCOL AND DIGLYCCLIC ACID; SAID REACTION BEING CONDUCTED AT A TEMPERATURE SUFFICIENTLY HIGH TO EVOLVE WATER AND BELOW THE PYROLYSIS POINT OF REACTANTS AND REACTION PRODUCT WITH THE ELIMINATION THROUGH REACTION OF APPROXIMATELY TWO-THIRDS OF THE CARBOXYL RADICALS PRESENT AND SUBSTANTIALLY ALL THE HYDROXYL RADICALS PRESENT.
References Cited (Backward Citations)
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US2379251A
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US2401966A
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US2499392A
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US2562878A
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |