Patent US2921002A successfully refreshed from Google Patents.
US2921002A
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Preparation of glutamic acid by aspergillus terreus
Assignee: Pfizer Inc
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Filing: 1956-07-17
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Granted: 1960-01-12
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Expires: 1976-07-17
Abstract
No abstract record available.
Inventors
- 👤 Donald A Kita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:44
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PREPARATION OF GLUTAMIC ACID WHICH COMPRISES CULTIVATING A STRAIN OF ASPERGILLUS TERREUS UNDER AEROBIC CONDITIONS IN AN AQUEOUS NUTRIENT FERMENTATION MEDUIM CONTAINING A SOURCE OF AVAILABLE NITROGEN AND A SOURCE OF CARBOHYDRATE, WHILE MAINTAINING THE PH OF THE MEDUIM AT FROM ABOUT 5.5 TO ABOUT 8.0, AND ADDING TO THE MEDUIM AFTER INITATION OF THE FERMENTATION A HIGH CONCENTRATION NITROGEN SOURCE.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PREPARATION OF GLUTAMIC ACID WHICH COMPRISES CULTIVATING A STRAIN OF ASPERGILLUS TERREUS UNDER AEROBIC CONDITIONS IN AN AQUEOUS NUTRIENT FERMENTATION MEDUIM CONTAINING A SOURCE OF AVAILABLE NITROGEN AND A SOURCE OF CARBOHYDRATE, WHILE MAINTAINING THE PH OF THE MEDUIM AT FROM ABOUT 5.5 TO ABOUT 8.0, AND ADDING TO THE MEDUIM AFTER INITATION OF THE FERMENTATION A HIGH CONCENTRATION NITROGEN SOURCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |