Patent US2723291A successfully refreshed from Google Patents.
US2723291A
Expired / Lapsed
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Treatment of glutamic acid-containing hydrolysates
Assignee: International Minerals and Chemical Corp
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Filing: 1954-02-19
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Granted: 1955-11-08
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Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 William E Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:43
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A PROCESS INVOLVING HYDROLYSIS WITH SULFURIC ACID OF MATERIAL CONTAINING GLUTAMIC ACID PRECURSOR COMPOUNDS, FOLLOWED BY TREATING THE HYDROLYSATE WITH A SUFFICIENT AMOUNT OF AN OXYGEN CONTAINING BASIC ALKALINE EARTH METAL COMPOUND TO PRODUCE A PH BETWEEN ABOUT 8.0 AND ABOUT 12.0, AND SEPARATING INSOLUBLE MATERIAL THEREFROM, THE IMPROVEMENTS COMPRISING TREATING THE HYDROLYSATE FROM WHICH INSOLUBLE MATERIAL HAS BEEN SEPARATED WITH SUFFICIENT ACIDIFYING REAGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE, AND CARBON DIOXIDE TO REDUCE THE PH TO BETWEEN ABOUT 4.5 AND ABOUT 7.5, SEPARATING THE ALKALINE EARTH METAL PRECIPITATE WHICH CONTAINS A SIGNIFICANT AMOUNT OF GLUTAMIC ACID FROM THE RESULTING HYDROLYSATE, TREATING THE PRECIPITATE WITH A MINERAL ACID, AND RECOVERING GLUTAMIC ACID FROM THE RESULTING SOLUTION.
Claim 2
Dependent Claim
120 words
IN A PROCESS INVOLVING HYDROLYSIS WITH SULFURIC ACID OF MATERIAL CONTAINING GLUTAMIC ACID PRECURSOR COMPOUNDS, FOLLOWED BY TREATING THE HYDROLYSATE WITH A SUFFICIENT AMOUNT OF AN OXYGEN CONTAINING BASIC ALKALINE EARTH METAL COMPOUND TO PRODUCE A PH BETWEEN ABOUT 8.0 AND ABOUT 12.0, AND SEPARATING INSOLUBLE MATERIAL THEREFROM, THE IMPROVEMENTS COMPRISING TREATING THE HYDROLYSATE FROM WHICH INSOLUBLE MATERIAL HAS BEEN SEPARATED WITH SUFFICIENT ACIDIFYING REAGENT SELECTED FROM THE GROUP CONSISTING OF SULFUR DIOXIDE, AND CARBON DIOXIDE TO REDUCE THE PH TO BETWEEN ABOUT 4.5 AND ABOUT 7.5, SEPARATING THE ALKALINE EARTH METAL PRECIPITATE WHICH CONTAINS A SIGNIFICANT AMOUNT OF GLUTAMIC ACID FROM THE RESULTING HYDROLYSATE, TREATING THE PRECIPITATE WITH A MINERAL ACID, AND RECOVERING GLUTAMIC ACID FROM THE RESULTING SOLUTION.
References Cited (Backward Citations)
US2647142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |