US2773001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing citrate ion-derived l-glutamic acid
Assignee: Rohm and Haas Co
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Filing: 1954-05-27
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Granted: 1956-12-04
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Carl V Smythe
- 👤 Hsing T Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:38
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/94; Y10S435/942; Y10S435/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD FOR PREPARING L-GLUTAMIC ACID WHICH COMPRISES TREATING WITH A LYSATE OF A YEAST WHICH OXIDIZES CITRIC AND GLUTAMIC ACIDS AN AQUEOUS SOLUTION CONTAINING CITRATE IONS AS THE EXCLUSIVE CARBON ATOM-YIELDING STARTING MATERIAL AND AMMONIUM IONS IN AN AMOUNT AT LEAST MOLEDULARLY PROPORTIONAL TO THE CITRATE, SAID SOLUTION HAVING A PH OF 6 TO 8.5, BEING AT A TEMPERATURE OF 20* TO 40* C., AND HAVING A CONCENTRATION BETWEEN 0.01 AND ABOUT 0.2 MOLAR WITH RESPECT TO CITRATE, PERMITTING THE LYSATE TO ACT ON SAID SOLUTION, WHEREBY AT LEAST ONE DECARBOXYLATION OCCURS AND AT LEAST ONE AMINATION TAKES PLACE, AND RECOVERING THE RESULTING CITRATE DERIVED GLUTAMATE CONTENT.
Claim 2
Independent Claim
108 words
A METHOD FOR PREPARING L-GLUTAMIC ACID WHICH COMPRISES TREATING WITH A LYSATE OF A YEAST WHICH OXIDIZES CITRIC AND GLUTAMIC ACIDS AN AQUEOUS SOLUTION CONTAINING CITRATE IONS AS THE EXCLUSIVE CARBON ATOM-YIELDING STARTING MATERIAL AND AMMONIUM IONS IN AN AMOUNT AT LEAST MOLEDULARLY PROPORTIONAL TO THE CITRATE, SAID SOLUTION HAVING A PH OF 6 TO 8.5, BEING AT A TEMPERATURE OF 20* TO 40* C., AND HAVING A CONCENTRATION BETWEEN 0.01 AND ABOUT 0.2 MOLAR WITH RESPECT TO CITRATE, PERMITTING THE LYSATE TO ACT ON SAID SOLUTION, WHEREBY AT LEAST ONE DECARBOXYLATION OCCURS AND AT LEAST ONE AMINATION TAKES PLACE, AND RECOVERING THE RESULTING CITRATE DERIVED GLUTAMATE CONTENT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |