US2816920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of zwitterion of detergent amino acids
Assignee: General Mills Inc
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Filing: 1955-08-11
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Granted: 1957-12-17
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Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 Donald L Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:43
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
PROCESS OF PREPARING A ZWITTERION OF A COMPOUND HAVING THE FORMULA RNHM(CHRCH2COOME)N IN WHICH R IS AN ALIPHATIC HYDROCARBON GROUP CONTAINING FROM 8-22 CARBON ATOMS, R'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL M IS NOT GREATER THAN 1 AND N IS AT LEAST 1 AND NOT MORE THAN 2 BUT IS 1 WHEN R'' IS CH3 AND THE SUM OF M AND N IS EQUAL TO 2 AND ME IS ALKALI METAL WHICH COMPRISES ADDING A NONOXIDIZING MINERAL ACID TO AN AQUEOUS SOLUTION OF SAID ALKALI METAL SALT TO PRODUCE A PH WITHIN THE RANGE OF 3.5 TO 5.5 WHILE AGITATING THE SOLUTION, DISCONTINUING THE AGITATION TO PERMIT THE PRECIPITATED ZWITTERION THUS FORMED TO SEPARATE AS AN AQUEOUS SOLUTION IN THE FORM OF A DISTINCT PHASE AND SEPARATING THE ZWITTERION PHASE.
Claim 2
Dependent Claim
135 words
PROCESS OF PREPARING A ZWITTERION OF A COMPOUND HAVING THE FORMULA RNHM(CHRCH2COOME)N IN WHICH R IS AN ALIPHATIC HYDROCARBON GROUP CONTAINING FROM 8-22 CARBON ATOMS, R'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL M IS NOT GREATER THAN 1 AND N IS AT LEAST 1 AND NOT MORE THAN 2 BUT IS 1 WHEN R'' IS CH3 AND THE SUM OF M AND N IS EQUAL TO 2 AND ME IS ALKALI METAL WHICH COMPRISES ADDING A NONOXIDIZING MINERAL ACID TO AN AQUEOUS SOLUTION OF SAID ALKALI METAL SALT TO PRODUCE A PH WITHIN THE RANGE OF 3.5 TO 5.5 WHILE AGITATING THE SOLUTION, DISCONTINUING THE AGITATION TO PERMIT THE PRECIPITATED ZWITTERION THUS FORMED TO SEPARATE AS AN AQUEOUS SOLUTION IN THE FORM OF A DISTINCT PHASE AND SEPARATING THE ZWITTERION PHASE.
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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |