Preparation of finely divided pulverulent carotinoid and retinoid compositions
Patent 4522743 Issued on June 11, 1985. Estimated Expiration Date: 
June 11, 2002. 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.
June 11, 2002. 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 References 2650895 3110598 3655406 3734745 3790688 Stable carotenoid solutions Patent #: 4316917 InventorsApplicationNo. 06/376585 filed on 05/10/1982US Classes:516/70, The compound contains plural peptide linkages, i.e., compound formed from amino acids, natural or synthetic, by reaction of a carboxyl group of one such amino acid with an amino group of another same or different such amino acid426/540, Specific dye or pigment per se or compositions containing same426/73, Vitamin is A or D516/72The agent contains organic compound containing oxygenExaminersPrimary: Lovering, Richard D.Assistant: Brookes, Anne Attorney, Agent or FirmInternational ClassesA23L 1/27 (20060101)A23L 1/275 (20060101) C09B 61/00 (20060101) Foreign Application Priority Data1981-05-15 DEAbstractFinely divided, pulverulent carotinoid or retinoid compositions, in which the carotinoid or retinoid essentially has a particle size of less than 0.5 micron, are prepared by a process wherein a carotinoid or retinoid is dissolved in a volatile, water-miscible, organic solvent at from 50° C. to 200° C., if necessary under superatmospheric pressure, within the space of less than 10 seconds. The carotinoid is immediately precipitated, in a colloidally disperse form, from the molecularly disperse solution by rapidly mixing the latter with an aqueous solution of a swellable colloid at from 0° C. to 50° C., and the resulting dispersion is freed from the solvent and the dispersing medium in a conventional manner.Other References
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