US2525902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glutamic acid
Assignee: International Minerals and Chemical Corp
•
Filing: 1947-06-05
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Granted: 1950-10-17
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Expires: 1967-06-05
Abstract
No abstract record available.
Inventors
- 👤 Forest A Hoglan
- 👤 Morris J Blish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS OF PRODUCING D-GLUTAMIC ACID WHICH COMPRISES SEPARATELY PREPARING AN ACID HYDROLYSATE OF A PROTEIN AND AN ALKALINE HYDROLYSATE OF STEFFEN''S FILTRATE, COMBINING THE TWO HYDROLYSATES TO GIVE A PH BETWEEN ABOUT 5.0 AND ABOUT 7.0, CONCENTRATING THE RESULTANT SOLUTION AT LEAST TO THE POINT OF INCIPIENT CRYSTALLIZATION, SEPARATING THEREFROM A MIXTURE CONTAINING SALTS, AMINO ACID VALUES OTHER THAN D-GLUTAMIC ACID VALUES, AND INSOLUBLE MATERIAL, ADJUSTING THE PH OF THE RESULTANT SOLUTION TO ABOUT 3.2 AND RECOVERING D-GLUTAMIC ACID THEREFROM.
Claim 2
Dependent Claim
81 words
THE PROCESS OF PRODUCING D-GLUTAMIC ACID WHICH COMPRISES SEPARATELY PREPARING AN ACID HYDROLYSATE OF A PROTEIN AND AN ALKALINE HYDROLYSATE OF STEFFEN''S FILTRATE, COMBINING THE TWO HYDROLYSATES TO GIVE A PH BETWEEN ABOUT 5.0 AND ABOUT 7.0, CONCENTRATING THE RESULTANT SOLUTION AT LEAST TO THE POINT OF INCIPIENT CRYSTALLIZATION, SEPARATING THEREFROM A MIXTURE CONTAINING SALTS, AMINO ACID VALUES OTHER THAN D-GLUTAMIC ACID VALUES, AND INSOLUBLE MATERIAL, ADJUSTING THE PH OF THE RESULTANT SOLUTION TO ABOUT 3.2 AND RECOVERING D-GLUTAMIC ACID THEREFROM.
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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |