Process for the formation, isolation and purification of comestible xanthophyll crystals from plants
Patent 5648564 Issued on July 15, 1997. Estimated Expiration Date: 
December 21, 2015. 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.
December 21, 2015. 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 ReferencesPurification of lutein-fatty acid esters from plant materials Process for isolation, purification, and recrystallization of lutein from saponified marigold oleoresin and uses thereof Patent #: 5382714 InventorsApplicationNo. 576778 filed on 12/21/1995US Classes:568/834, Polycarbon alkyl group containing568/822, Six-membered alicyclic ring containing568/825, Single hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal)568/832, Hydroxy bonded directly to the ring (e.g., terpin hydrate, etc.) (H of -OH may be replaced by a Group IA or IIA light metal)568/913Purification or recoveryExaminersPrimary: Geist, GaryAssistant: Puttlitz, Karl Attorney, Agent or FirmInternational ClassC07C 035/08AbstractA process for forming, isolating and purifying xanthophyll crystals, preferably lutein from marigold flower petals, zeaxanthin from wolfberries or capsanthin and capsorubin from red pepper, is disclosed. A xanthophyll diester-containing plant extract is saponified in a composition of propylene glycol and aqueous alkali to form xanthophyll crystals. Crystallization is achieved without the use of added organic solvents. The crystals are isolated and purified. The substantially pure xanthophyll crystals so obtained are suitable for human consumption and can be used as a nutritional supplement and as an additive in food.Other References
Field of SearchPolycarbon alkyl group containingHydroxy bonded directly to the ring (e.g., terpin hydrate, etc.) (H of -OH may be replaced by a Group IA or IIA light metal) Six-membered alicyclic ring containing Single hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) Purification or recovery |
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