US2979439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing l-lysine by fermentation
Assignee: KH Neochem Co Ltd
•
Filing: 1958-11-04
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Granted: 1961-04-11
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Expires: 1978-11-04
Abstract
No abstract record available.
Inventors
- 👤 Kinoshita Shukuo
- 👤 Nakayama Kiyoshi
- 👤 Kitada Sohei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:34
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/08; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/859; Y10S435/861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF PRODUCING L-LYSINE BY FERMENTATION WHICH COMPRISES CULTURING IN A CULTURING MEDIUM UNDER AEROBIC CONDITIONS A NUTRITIONALLY DEFICIENT MUTANT OF MICROCOCCUS GLUMATICUS, WHICH MUTANT REQUIRES FOR ITS GROWTH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) HOMOSERINE, (B) THREONINE AND METHLONINE, (C) THREONINE AND CYSTATHIONE, AND (D) THREONINE AND HOMOCYSTEINE, MAINTAINING THE PH OF THE CULTURING MEDIUM WITHIN A RANGE OF OF FROM ABOUT 5.1 TO 8.5 UNTIL A SUBSTANTIAL AMOUNT OF L-LYSINE IS ACCUMULATED IN SAID MEDIUM AND RECOVERING L-LYSINE FROM THE MEDIUM.
Claim 2
Independent Claim
87 words
A METHOD OF PRODUCING L-LYSINE BY FERMENTATION WHICH COMPRISES CULTURING IN A CULTURING MEDIUM UNDER AEROBIC CONDITIONS A NUTRITIONALLY DEFICIENT MUTANT OF MICROCOCCUS GLUMATICUS, WHICH MUTANT REQUIRES FOR ITS GROWTH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) HOMOSERINE, (B) THREONINE AND METHLONINE, (C) THREONINE AND CYSTATHIONE, AND (D) THREONINE AND HOMOCYSTEINE, MAINTAINING THE PH OF THE CULTURING MEDIUM WITHIN A RANGE OF OF FROM ABOUT 5.1 TO 8.5 UNTIL A SUBSTANTIAL AMOUNT OF L-LYSINE IS ACCUMULATED IN SAID MEDIUM AND RECOVERING L-LYSINE FROM THE MEDIUM.
References Cited (Backward Citations)
US2771396A
Cited
US2841532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |