US2804474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aminocarboxylic acids
Assignee: California Research LLC
•
Filing: 1953-06-29
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Granted: 1957-08-27
•
Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Henry Y Lew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/26; C07C227/02; C07C227/04; C07C227/06; C07C227/08; C07C227/14; C07C227/18; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08; C07C229/10; C07C229/16; C07C229/24; C07C231/00; C07C231/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF PREPARING ORGANO-SSUBSTITUTED AMINOCARBOXYLIC ACIDS HAVING MORE THAN ONE CARBOXYL GROUP AND AT LEAST ONE HYDROCARBON SUBSTITUENT WITH 1 TO 20 CARBON ATOMS ATTACHED TO THE AMINO-NITROGEN ATOM, WHICH COMPRISES REACTING AN AMINE CONTAINING AT LEAST ONE HYDROCARBON SUBSTITUENT HAVING FROM 1 TO 20 CARBON ATOMS AND AT LEAST ONE HYDROGEN ATTACHED TO THE AMINO-NITROGEN ATOM WITH AN ALKALI METAL SALT OF A MONOHALOGEN-SUBSTITUTED C2-C4 ALIPHATIC MONOCARBOXYLIC ACID IN THE PRESENCE OF SODIUM BICARBONATE IN AN AMOUNT SUFFICIENT TO NEUTRALIZE THE FREE INORGANIC HALOGEN ACID FORMED IN THE REACTION.
Claim 2
Independent Claim
91 words
A METHOD OF PREPARING ORGANO-SSUBSTITUTED AMINOCARBOXYLIC ACIDS HAVING MORE THAN ONE CARBOXYL GROUP AND AT LEAST ONE HYDROCARBON SUBSTITUENT WITH 1 TO 20 CARBON ATOMS ATTACHED TO THE AMINO-NITROGEN ATOM, WHICH COMPRISES REACTING AN AMINE CONTAINING AT LEAST ONE HYDROCARBON SUBSTITUENT HAVING FROM 1 TO 20 CARBON ATOMS AND AT LEAST ONE HYDROGEN ATTACHED TO THE AMINO-NITROGEN ATOM WITH AN ALKALI METAL SALT OF A MONOHALOGEN-SUBSTITUTED C2-C4 ALIPHATIC MONOCARBOXYLIC ACID IN THE PRESENCE OF SODIUM BICARBONATE IN AN AMOUNT SUFFICIENT TO NEUTRALIZE THE FREE INORGANIC HALOGEN ACID FORMED IN THE REACTION.
References Cited (Backward Citations)
US2316606A
Cited
US2316636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |