US3398078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of glutamic acid values by electrodialysis
Assignee: International Minerals and Chemical Corp
•
Filing: 1965-03-17
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Granted: 1968-08-20
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Harry P Gregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:41
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE ELECTRODIALYTIC TREATMENT OF GLUTAMIC ACID-CONTAINING SOLUTIONS IN AN ELECTRODIALYTIC CELL ARRANGEMENT HAVING ALTERNATE ANION- AND CATION-PERMEABLE MEMBRANES WHICH COMPRISES (1) POSITIONING A GLUTAMATE ION-CONTAINING AQUEOUS SOLUTION IN A COMPARTMENT (Y) BETWEEN TWO COMPARTMENTS (X) AND (Z) CONTAINING WATER, SAID FIRST WATER COMPARTMENT (X) BEING POSITIONED ON THE ANODE SIDE OF COMPARTMENT (Y) AND BEING SEPARATED FROM COMPARTMENT (Y) BY AN ANION-PERMEABLE MEMBRANE, SAID SECOND WATER COMPARTMENT (Z) BEING POSITIONED ON THE CATHODE SIDE OF COMPARTMENT (Y) AND BEING SEPARATED FROM COMPARTMENT (Y) BY A CATION-PERMEABLE MEMBRANE; AND (2) POSITIONING AN AQUEOUS SOLUTION OF AN IONIZABLE COMPOUND CONTAINING CATIONS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND METAL CATIONS IN A COMPARTMENT (W) ADJACENT TO COMPARTMENT (X)
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE ELECTRODIALYTIC TREATMENT OF GLUTAMIC ACID-CONTAINING SOLUTIONS IN AN ELECTRODIALYTIC CELL ARRANGEMENT HAVING ALTERNATE ANION- AND CATION-PERMEABLE MEMBRANES WHICH COMPRISES (1) POSITIONING A GLUTAMATE ION-CONTAINING AQUEOUS SOLUTION IN A COMPARTMENT (Y) BETWEEN TWO COMPARTMENTS (X) AND (Z) CONTAINING WATER, SAID FIRST WATER COMPARTMENT (X) BEING POSITIONED ON THE ANODE SIDE OF COMPARTMENT (Y) AND BEING SEPARATED FROM COMPARTMENT (Y) BY AN ANION-PERMEABLE MEMBRANE, SAID SECOND WATER COMPARTMENT (Z) BEING POSITIONED ON THE CATHODE SIDE OF COMPARTMENT (Y) AND BEING SEPARATED FROM COMPARTMENT (Y) BY A CATION-PERMEABLE MEMBRANE; AND (2) POSITIONING AN AQUEOUS SOLUTION OF AN IONIZABLE COMPOUND CONTAINING CATIONS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND METAL CATIONS IN A COMPARTMENT (W) ADJACENT TO COMPARTMENT (X)
References Cited (Backward Citations)
US3330749A
Cited
US3231485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |