Patent US3767529A successfully refreshed from Google Patents.
US3767529A
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Method of producing l-isoleucine by fermentation
Assignee: Ajinomoto Co Inc
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Filing: 1971-11-10
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Granted: 1973-10-23
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Expires: 1991-11-10
Abstract
Abstract Certain microorganisms of genus Brevibacterium, Coryne-bacterium and Arthrobacter produce L-isoleucine directly from glucose or acetic acid in the culture medium.
Inventors
- 👤 F Yoshinaga
- 👤 K Kubota
- 👤 I Jujita
- 👤 S Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/84; Y10S435/843
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
A method as set forth in claim 1, wherein said medium is free from any precursor of isoleucine.
Claim 2
Dependent Claim
21 words
A method as set forth in claim 1, wherein said bacterium is Brevibacterium flavum FERM P-805 or CorynEbacterium acetoacidophilum FERM P-840.
Claim 3
Dependent Claim
24 words
A method as set forth in claim 2, wherein said precursor is Alpha -aminobutyric acid, Alpha -hydroxybutyric acid, threonine, aspartic acid, or fumaric acid.
Claim 4
Dependent Claim
24 words
A method as set forth in claim 1, wherein the carbon source in said fermentation medium essentially consists of a carbohydrate or acetic acid.
References Cited (Backward Citations)
US3231478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |