US2993071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of salts of detergent amino acids
Assignee: General Mills Inc
•
Filing: 1959-03-10
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Granted: 1961-07-18
•
Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Donald L Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:21
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE PROCESS OF PURIFYING THE SALT OF A DETERGENT AMINO ACID OF THE FORMULA RNHM(CHR''CH2COOME)N WHERE R IS AN ALIPHATIC HYDROCARBON GROUP CONTAINING 8-22 CARBON ATOMS, R'' IS SELECTED FROM A GROUP CONSISTING OF HYDROGEN AND METHYL, ME IS A CATION SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM, AND AMMONIUM IONS, M IS NOT GREATER THAN 1, N IS AT LEAST 1 AND NOT MORE THAN 2 BUT 1 WHEN R'' IS METHYL AND THE SUM OF N AND M IS 2, WHICH METHOD COMPRISES FORMING THE ZWITTERION, SEPARATING SAID ZWITTERION, ADDING ETHYLENE DICHLORIDE TO SAID ZWITTERION, DISSOLVING THE ZWITTERION IN THE ETHYLENE DICHLORIDE, COOLING TO CAUSE SEPARATION OF AN ETHYLENE DICHLORIDE PHASE, SEPARATING THE ETHYLENE DICHLORIDE AND RECOVERING THE ZWITTERION.
Claim 2
Dependent Claim
122 words
THE PROCESS OF PURIFYING THE SALT OF A DETERGENT AMINO ACID OF THE FORMULA RNHM(CHR''CH2COOME)N WHERE R IS AN ALIPHATIC HYDROCARBON GROUP CONTAINING 8-22 CARBON ATOMS, R'' IS SELECTED FROM A GROUP CONSISTING OF HYDROGEN AND METHYL, ME IS A CATION SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM, AND AMMONIUM IONS, M IS NOT GREATER THAN 1, N IS AT LEAST 1 AND NOT MORE THAN 2 BUT 1 WHEN R'' IS METHYL AND THE SUM OF N AND M IS 2, WHICH METHOD COMPRISES FORMING THE ZWITTERION, SEPARATING SAID ZWITTERION, ADDING ETHYLENE DICHLORIDE TO SAID ZWITTERION, DISSOLVING THE ZWITTERION IN THE ETHYLENE DICHLORIDE, COOLING TO CAUSE SEPARATION OF AN ETHYLENE DICHLORIDE PHASE, SEPARATING THE ETHYLENE DICHLORIDE AND RECOVERING THE ZWITTERION.
References Cited (Backward Citations)
US2811549A
Cited
US2816920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |