US3759790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing l phenylalanine
Assignee: KH Neochem Co Ltd
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Filing: 1971-07-16
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Granted: 1973-09-18
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Expires: 1991-07-16
Abstract
Abstract L-PHENYLALANINE IS PRODUCED IN SUBSTANTIAL YIELD BY FERMENTATION FROM AN L-PHENYLALANINE-PRODUCING STRAIN OF CORYNEFORM GLUTAMIC ACID-PRODUCING BACTERIA REPRESENTED BY CORYNEBACTERIUM GLUTAMICUM. SPECIFICALLY MUTATED STRAINS OF THE ABOVE NOTED BACTERIA THAT EXHIBIT RESISTANCE TO AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF TYROSINE, PHENYLALANINE AND ANALOGUES THEREOF AND EXHIBIT A TYROSINE REQUIREMENT, PRODUCE LARGE AMOUNTS OF L-PHENYLALANINE WHEN CULTURED IN A SUITABLE NUTRIENT MEDIUM.
Inventors
- 👤 K Nakayama
- 👤 H Hagino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:06
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/22; C12P13/222; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/83; Y10S435/843; Y10S435/859; Y10S435/861
Claims Analysis
Total Claims: 0
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |