US3684654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing l-threonine
Assignee: KH Neochem Co Ltd
•
Filing: 1968-06-17
•
Granted: 1972-08-15
•
Expires: 1988-06-17
Abstract
Abstract THE PROCESS FOR THE PRODUCTION OF L-THREONINE BY FERMENTATION WHICH COMPRISES CULTURING ESCHERICHIA MICROORGANISMS THAT REQUIRE DIAMINOPIMELIC ACID AND ISOLEUCINE FOR THEIR GROWTH IN AN AQUEOUS NUTRIENT MEDIUM UNDER AEROBIC CONDITIONS. YIELDS OF ABOUT 5-10 G./I. ARE OBTAINED.
Inventors
- 👤 Kiyoshi Nakayama
- 👤 Haruo Tanaka
- 👤 Hiroshi Kase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/08; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/848; Y10S435/849
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |