Extraction of carotenoids from natural sources
Patent 5245095 Issued on September 14, 1993. Estimated Expiration Date: 
April 12, 2011. 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.
April 12, 2011. 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 ReferencesInventorsAssigneeApplicationNo. 684590 filed on 04/12/1991US Classes:585/351, Carotene or derivative585/801, By conversion of solid to gas, e.g., sublimation, etc., or by melting or squeezing out liquid from solid natural source585/803, To recover alicyclic585/853, Alkaline metal-containing585/854Elemental metal, oxide, or hydroxideExaminersPrimary: McFarlane, AnthonyAssistant: Phan, Nhat D. Attorney, Agent or FirmForeign Patent References
International ClassesC07C 403/00C07C 007/00 AbstractA carotenoid-enriched fraction is extracted from natural sources, such as carrots, by (i) separating the carotenoid-containing natural source into a carotenoid-containing liquid fraction and a pulp fraction, (ii) adding a carotenoid precipitation agent including calcium chloride, calcium hydroxide, calcium lactate or calcium gluconate to the liquid fraction to form a carotenoid-enriched solid precipitate, and (iii) separating the carotenoid-enriched solid precipitate from the carotenoid-depleted liquid portion.Other References
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