Process of producing alkali metal or ammonium citrates
Patent 3944606 Issued on March 16, 1976. Estimated Expiration Date: 
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3904684 InventorsAssigneeApplicationNo. 518714 filed on 10/29/1974US Classes:562/584Citric acid per se or salt thereofExaminersPrimary: Weinberger, Lorraine A.Assistant: Killos, Paul J. Attorney, Agent or FirmForeign Application Priority Data1973-11-03 DTAbstractAlkali metal or ammonium citrates are produced from solutions of citric acid obtained by chemical reaction or by fermentation by extraction by means of a specific water-immiscible mixture of aliphatic amines and organic solvents and re-extracting the resulting organic solvent mixture with an aqueous solution of an alkali metal hydroxide, carbonate or bicarbonate, ammonia, or their salts. |
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