US3086916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing l-glutamic acid from racemic glutamic acid
Assignee: KH Neochem Co Ltd
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Filing: 1961-08-02
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Granted: 1963-04-23
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Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Kinoshita Shukuo
- 👤 Tanaka Masao
- 👤 Kato Yo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:05
CPC Classifications
C; C12; C12P; C12P17/00; C12P17/10; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR PRODUCING L-GLUTAMIC ACID FROM RACEMIC GLUTAMIC ACID, WHICH COMPRISES ADDING AN ENZYMATIC MATERIAL PRODUCED BY CULTIVATION OF A GLUTAMIC ACID-RACEMASE-YIELDING BACTERIA BELONGING TO LACTOBACILLUS GROUP AND AN ENZYMATIC MATERIAL PRODUCED BY CULTIVATION OF A STRAIN OF PSEUDOMONAS CRUCIVIAE (INCLUDING ITS MUTANT STRAINS) TO AN AQUEOUS SOLUTION CONTAINING RACEMIC GLUTAMIC ACID, THEREBY CAUSING A REACTION TO CONVERT THE GLUTAMIC ACID TO L-2-PYRROLIDONE-CARBOXYLIC ACID, AND HYDROLYZING THE RESULTING L-PYRROLIDONE-5-CARBOXYLIC ACID, AND RECOVERING L-GLUTAMIC ACID FROM THE HYDROLYSATE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR PRODUCING L-GLUTAMIC ACID FROM RACEMIC GLUTAMIC ACID, WHICH COMPRISES ADDING AN ENZYMATIC MATERIAL PRODUCED BY CULTIVATION OF A GLUTAMIC ACID-RACEMASE-YIELDING BACTERIA BELONGING TO LACTOBACILLUS GROUP AND AN ENZYMATIC MATERIAL PRODUCED BY CULTIVATION OF A STRAIN OF PSEUDOMONAS CRUCIVIAE (INCLUDING ITS MUTANT STRAINS) TO AN AQUEOUS SOLUTION CONTAINING RACEMIC GLUTAMIC ACID, THEREBY CAUSING A REACTION TO CONVERT THE GLUTAMIC ACID TO L-2-PYRROLIDONE-CARBOXYLIC ACID, AND HYDROLYZING THE RESULTING L-PYRROLIDONE-5-CARBOXYLIC ACID, AND RECOVERING L-GLUTAMIC ACID FROM THE HYDROLYSATE.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |