Patent US4734583A successfully refreshed from Google Patents.
Patent US3320135A successfully refreshed from Google Patents.
US3320135A
Expired / Lapsed
US
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Method of producing l-glutamic acid from hydantoinpropionic acid
Assignee: Ajinomoto Co Inc
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Filing: 1966-10-11
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Granted: 1967-05-16
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Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 Okumura Shinji
- 👤 Tsugawa Ryuichiro
- 👤 Katsuya Noboru
- 👤 Takahashi Masahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:41
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/824; Y10S435/832; Y10S435/833; Y10S435/848; Y10S435/859; Y10S435/874
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD OF PRODUCING L-GLUTAMIC ACID WHICH COMPRISES CONTACTING HYDANTOINPROPIONIC ACID IN AQUEOUS SOLUTION AT PH 6-11 WITH AN ENZYME OF MICROBIAL ORIGIN CAPABLE OF HYDROLYZING HYDANTOINPROPIONIC ACID UNTIL SAID HYDANTOINPROPIONIC ACID IS CONVERTED TO L-GLUTAMIC ACID, AND RECOVERING SAID L-GLUTAMIC ACID FROM SAID SOLUTION.
Claim 2
Independent Claim
45 words
A METHOD OF PRODUCING L-GLUTAMIC ACID WHICH COMPRISES CONTACTING HYDANTOINPROPIONIC ACID IN AQUEOUS SOLUTION AT PH 6-11 WITH AN ENZYME OF MICROBIAL ORIGIN CAPABLE OF HYDROLYZING HYDANTOINPROPIONIC ACID UNTIL SAID HYDANTOINPROPIONIC ACID IS CONVERTED TO L-GLUTAMIC ACID, AND RECOVERING SAID L-GLUTAMIC ACID FROM SAID SOLUTION.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |