US2683739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the crystallization of l-glutamic acid
Assignee: International Minerals and Chemical Corp
•
Filing: 1952-03-03
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Granted: 1954-07-13
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Expires: 1972-03-03
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Weidman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; C12P13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR THE CRYSTALIZATION OF MONOCLINIC GLUTAMIC ACID CRYSTALS WHICH COMPRISES ADJUSTING THE PH OF AN AQUEOUS SOLUTION CONTAINING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MINERAL ACID AND GLUTAMIC ACID MINERAL ACID ADDTION SALT BY ADMIXING THEREWITH AN AQUEOUS SOLUTION CONTAINING A COMPOSTION SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXYGEN-CONTAINING ALKALINE COMPOUNDS AND MONOSODIUM GLUTAMIC, WHEREIN THE ADJUSTED SOLUTION CONTAINS GLUTAMIC ACID AT A PH BETWEEN ABOUT 2.5 AND ABOUT 4.0, SAID SOLUTION BEING ADJUSTED RAPIDLY AND WITH AGITAION AND SAID AQUEOUS GLUTAMIC ACID SOLUTION CONTAINING FROM THE COMMENCEMENT OF THE SAID PH ADJUSTIMENT UP TO ABOUT THIRTY SECONDS AFTER THE COMPLETION OF SAID PH ADJUSTMENT, AT LEAST ONE CRYSTAL NUCLEUS OF MONOCLINIC GLUTAMIC ACID, AND SEPARATING MONOCLINIC GLUTAMIC ACID CRYSTALS FROM THE RESULTING CRYSTAL CONTAINING SLURRY.
Claim 2
Dependent Claim
131 words
A PROCESS FOR THE CRYSTALIZATION OF MONOCLINIC GLUTAMIC ACID CRYSTALS WHICH COMPRISES ADJUSTING THE PH OF AN AQUEOUS SOLUTION CONTAINING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MINERAL ACID AND GLUTAMIC ACID MINERAL ACID ADDTION SALT BY ADMIXING THEREWITH AN AQUEOUS SOLUTION CONTAINING A COMPOSTION SELECTED FROM THE GROUP CONSISTING OF INORGANIC OXYGEN-CONTAINING ALKALINE COMPOUNDS AND MONOSODIUM GLUTAMIC, WHEREIN THE ADJUSTED SOLUTION CONTAINS GLUTAMIC ACID AT A PH BETWEEN ABOUT 2.5 AND ABOUT 4.0, SAID SOLUTION BEING ADJUSTED RAPIDLY AND WITH AGITAION AND SAID AQUEOUS GLUTAMIC ACID SOLUTION CONTAINING FROM THE COMMENCEMENT OF THE SAID PH ADJUSTIMENT UP TO ABOUT THIRTY SECONDS AFTER THE COMPLETION OF SAID PH ADJUSTMENT, AT LEAST ONE CRYSTAL NUCLEUS OF MONOCLINIC GLUTAMIC ACID, AND SEPARATING MONOCLINIC GLUTAMIC ACID CRYSTALS FROM THE RESULTING CRYSTAL CONTAINING SLURRY.
References Cited (Backward Citations)
US2517601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |