Patent US4198054A successfully refreshed from Google Patents.
Patent US2533114A successfully refreshed from Google Patents.
US2533114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of glutamic acid
Assignee: International Minerals and Chemical Corp
•
Filing: 1947-08-29
•
Granted: 1950-12-05
•
Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Forest A Hoglan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32; C; C12; C12P; C12P13/00; C12P13/04; C12P13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN THE PROCESS OF PRODUCING 1($) GLUTAMIC ACID BY HYDROLYSIS OF A PROTEIN WITH SULFURIC ACID IN WHICH THE ACIDIC HYDROLYSATE IS REACTED WITH A SUBSTANTIAL EXESS OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALKALINE EARTH METAL OXIDES AND HYDROXIDES AND THE RESULTANT ALKALINE EARTH METAL SULFATE PRECIPITATE IS REMOVED FROM THE ALKALINE REACTION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN REACTING THE RESIDUAL ALKALINE EARTH METAL PRESENT IN THE ALKALINE REACTION MIXTURE WITH A SOLUBLE SULFITE WHILE MAINTAINING THE PH OF THE MIXTURE AT ABOUT 5.5-7.5 AND THEN REMOVING THE RESULTANT ALKALINE EARTH METAL SULFITE PRECIPITATE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
102 words
IN THE PROCESS OF PRODUCING 1($) GLUTAMIC ACID BY HYDROLYSIS OF A PROTEIN WITH SULFURIC ACID IN WHICH THE ACIDIC HYDROLYSATE IS REACTED WITH A SUBSTANTIAL EXESS OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALKALINE EARTH METAL OXIDES AND HYDROXIDES AND THE RESULTANT ALKALINE EARTH METAL SULFATE PRECIPITATE IS REMOVED FROM THE ALKALINE REACTION MIXTURE, THE IMPROVEMENT WHICH CONSISTS IN REACTING THE RESIDUAL ALKALINE EARTH METAL PRESENT IN THE ALKALINE REACTION MIXTURE WITH A SOLUBLE SULFITE WHILE MAINTAINING THE PH OF THE MIXTURE AT ABOUT 5.5-7.5 AND THEN REMOVING THE RESULTANT ALKALINE EARTH METAL SULFITE PRECIPITATE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US1938512A
Cited
US1992462A
Cited
US2071282A
Cited
US2180636A
Cited
US2180637A
Cited
US2241927A
Cited
US2347220A
Cited
US2373342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |