Patent US3420744A successfully refreshed from Google Patents.
US3420744A
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Process for producing l-glutamine
Assignee: KH Neochem Co Ltd
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Filing: 1966-03-01
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Granted: 1969-01-07
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Expires: 1986-03-01
Abstract
No abstract record available.
Inventors
- 👤 Yuichi Noguchi
- 👤 Junichi Nakajima
- 👤 Tetsuo Uno
- 👤 Toru Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:55
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/848; Y10S435/849; Y10S435/859; Y10S435/861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR THE PRODUCTION OF L-GLUTAMINE BY FERMENTATION IN AN AQUEOUS NUTRIENT MEDIUM UNDER AEROBIC CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE FERMENTATION IN THE PRESENCE OF MORE THAN 10-7 MOLE PER LITER OF CULTURE MEDIUM OF A METAL SELECTED FROM THE GROUP CONSISTING OF LEAD, CHROMIUM, NICKEL, ALUMINUM, COBALT, MERCURY AND MIXTURES THEREOF.
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR THE PRODUCTION OF L-GLUTAMINE BY FERMENTATION IN AN AQUEOUS NUTRIENT MEDIUM UNDER AEROBIC CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE FERMENTATION IN THE PRESENCE OF MORE THAN 10-7 MOLE PER LITER OF CULTURE MEDIUM OF A METAL SELECTED FROM THE GROUP CONSISTING OF LEAD, CHROMIUM, NICKEL, ALUMINUM, COBALT, MERCURY AND MIXTURES THEREOF.
References Cited (Backward Citations)
US3216906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |