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| Number | Title | Issue Date |
| 7192456 | Method of preparing a purified purple corn coloring agent A method of preparing a purified purple corn coloring agent comprising passing a purple corn color extract solution through an adsorption resin, washing with water, and releasing the purple corn color from the resin with the use of an aqueous solution containing alc... | 03/20/2007 |
| 6749647 | Fiber dyeing method and dyed fiber products A fiber is dyed with fine powder of peels of citrus fruits, the fine powder being obtained by pulverizing dried peels of the citrus fruits. The dyeing is performed using a bath of a dye extracted from the fine powder of the peels of the citrus fruits, or performed a... | 06/15/2004 |
| 6443998 | Trichromatic fiber dyeing processes and compositions thereof In one aspect, the invention provides a process for the trichromatic dyeing of polyamide textile fibers wherein the process comprises the steps of: a. providing at least one polyamide fiber; and b. contacting the at least one polyamide fiber with an aqueous dye sol... | 09/03/2002 |
| 6329010 | Process for producing a food colorant, colorant thus obtained and uses thereof The process is based on the stabilization of a natural colorant such as cephalopod ink and is carried out in two phases, a microbiological stabilization and a chemisal stabilization, the first being carried out between 80 and 90° C. and the chemical stab... | 12/11/2001 |
| 6221417 | Conversion of xanthophylls in plant material for use as a food colorant This invention relates to the in situ process for converting non-free-form xanthophylls to free xanthophylls in the biological material of the plant. The method, more particularly, relates to a method that would liberate xanthophylls by transesterificatio... | 04/24/2001 |
| 6132791 | Natural red sunflower anthocyanin colorant with naturally stabilized color qualities, and the process of making The production and use of a stable ruby red natural colorant prepared from an anthocyanin derived from purple hulled sunflower is described. The production of the ruby red natural colorant comprises the extraction of anthocyanin with an organically acidif... | 10/17/2000 |
| 5922085 | Preparation of a dye for coloring protein-based fibers and cellulose-based materials from the oxidation products of the manufacture of a triphenylmethane dye A process of preparing a dye composition and a resultant dye composition. The process includes preparing a mixture comprising a triphenylmethane dye and oxidation products by reacting methylenedianiline, aniline, an oxidation catalyst, and an oxidant; sep... | 07/13/1999 |
| 5750379 | Process for the production of carthamin Carthamin (safflower red dyestuff) which is highly useful but has been limited in use due to its high price, can be efficiently obtained from safflower yellow B dyestuff of which the content in safflower petals is large, and the safflower red dyestuff the... | 05/12/1998 |
| 5704950 | Process for manufacturing food grade colors from flowers, typically hibiscus A process for the manufacture of food colors from hibiscus flowers comprising the steps of removing the calyx and the androceum of half bloom flowers; washing the flowers; and storing the flowers in a pre-cleaned stainless vessel; heating the flowers with... | 01/06/1998 |
| 5700464 | Process for extracting with liquids soluble substances from subdivided solids Small particles and fines included along with larger subdivided solids are treated with liquid to extract soluble solids therein in a process using milli-screens with milli-sized openings of less than about 0.095 inches across. The milli-screen openings m... | 12/23/1997 |
| 5244469 | Process for preparation of black coloring materials and application thereof: chitosan treated with black extract of lithospermum root A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is ... | 09/14/1993 |
| 5221289 | Dyed textile products and a method of producing them A dyed textile article treated with tannic acid and dyed with an extract of mycelia or basidiocarps of Ganoderma lucidum. This article is produced by a process comprising contacting a substrate article of cotton, linen, silk or wool first with a pretreati... | 06/22/1993 |
| 5221532 | Coulteria tinctoria pod extract hair treatment composition A composition for treating hair including Coulteria tinctoria pod extract activated by high temperatures, which composition is formulated into a thixotropic paste or cream for direct application to hair, subjecting the hair to the composition for a select... | 06/22/1993 |
| 5210186 | Method for recovery and separation of chitin, proteins and astaxanthin and esters thereof A method is provided for recovering astaxanthin, astaxanthin carotenoids, astaxanthin esters, chitin and proteins from crustacean tissues containing such. The method comprises an initial extraction of crustacean tissue with boiling lye to form an alkaline... | 05/11/1993 |
| 5147673 | Colorant based on carminic acid, method of preparation, and method of coloring a foodstuff A red colorant based on carminic acid which is substantially stable against color changes when exposed to acidic media and a method for preparing the same is disclosed wherein carminic acid is reacted with effective amounts of a nitrogenous base and an or... | 09/15/1992 |
| 5042989 | Process for producing luminescent dyestuffs from plant materials Plant materials such as petals, leaves, fruits, are gathered, dried at a minimum temperature of 70° C., and pulverized so as to produce light-fast, lustrous dyestuffs. Subsequently, an acid or base substance is added. It is preferred that a pH value that... | 08/27/1991 |
| 5039536 | Production and use of a high-intensity red natural colorant derived from carrot cell tissue cultures The production and use of a high-intensity red natural colorant prepared from an anthocyanin derived from the cell line of Daucus carota (carrot) is described. The production of the high-intensity red natural colorant comprises the cultivation of Daucus c... | 08/13/1991 |
| 4878921 | Natural blue dye composition and colorant using the same: prepared by reacting taurine and genipin A natural blue dye composition that has improved stability and which can be used as a colorant in a broad range of applications including foodstuffs and drugs, and a process for preparing the same are disclosed. Genipin which is derived from gardenia fruit by ... | 11/07/1989 |
| 4693892 | Gelatin containing ଲ-carotene Light-fast capsules for dihydropyridines such as nifedipine and nisoldipine are formed of gelatin colored with a mixture of ଲ-carotene and iron oxide.... | 09/15/1987 |
| 4563193 | Asymmetric 1:2 chrome complex dyes containing an azo and an azomethine compound The novel asymmetric 1:2 chrome complex dyes of the formula I given in claim 1 are suitable in particular for dyeing wool or polyamide and especially leather.... | 01/07/1986 |
| 4500556 | Anthocyanin colorant from grape pomace Grape pomace is contacted with an aqueous extraction solvent containing HSO3- ions to form anthocyanin-(HSO3) complex. The complex is recovered by treating the liquid extract phase with a non-ionic adsorbent to adsorb the ... | 02/19/1985 |
| 4481226 | Stabilized anthocyanin food colorant The storage and light stability of an anthocyanin food colorant obtained by extraction from grape pomace is enhanced by combination with tannic acid.... | 11/06/1984 |
| 4400400 | Acid soluble blue colorant for food products Spirulina blue, which is not soluble at low pH, is subjected to enzymatic hydrolysis in an aqueous alkaline medium. The pH of the aqueous system is lowered and the liquid phase is dried to produce a blue dye in dry form which is soluble at low pH. The blu... | 08/23/1983 |
| 4383833 | Natural edible dye preparation from bean husks giving red shades A natural, edible dye, characterized by particular infrared and ultraviolet spectra and a method for its production, in which cell walls of the skins of colored beans of the genus Phaseolus, such as black beans, are destroyed, the released dye is extracte... | 05/17/1983 |
| 4358286 | Cosmetic hair dye composition based on a powder of vegetable origin This invention has for its object new cosmetic compositions for treating hair and skin containing a powder of plant origin obtained from extraction residues of various plants.... | 11/09/1982 |
| 4302200 | Process for extracting anthocyanin-type colors from natural products A process for the extraction of an anthocyanin-type color from a natural product which comprises bringing the natural product containing said color into contact with a sulfite ion-containing aqueous solution at a temperature of 85° C. or higher for 30 mi... | 11/24/1981 |
| 4268265 | Natural dyestuffs for gelatine capsules Process for stabilizing dyestuffs sensitive to light and/or oxidation, especially natural dyestuffs, by adsorption on a highly disperse adsorbent, whereby the dyestuff is immobilized, as well as the application of the process to dyestuffs which are determ... | 05/19/1981 |
| 4260388 | Purification of anthocyan solutions Aqueous solutions of anthocyans are purified by contacting same with a particular, metallic oxide adsorbent, said adsorbent being coated with a thin film of a styrene polymer, and thence by separating the adsorbent and treating it with an eluant. The elua... | 04/07/1981 |
| 4238518 | Process for the preparation of a stable Beta vulgaris extract Preparing an edible stabilized betanidine pigment by complexing an extract of Beta vulgaris with an acid polysaccharide.... | 12/09/1980 |
| 4204043 | Method of removing pigment from annatto seed Pigment is extracted from seeds containing the same by contacting the seeds with water containing one or more alpha-enzymes for a period of time and at a temperature sufficient to extract the pigment. In particular, annatto pigment can be extracted from t... | 05/20/1980 |
| 4156077 | Process for obtaining a dye substance of vegetal origin A method of producing anthocyanin, comprising the steps of treating sunflower seed husks containing anthocyanin at ambient temperature and in a non-oxidizing atmosphere with an acid solution selected from a group consisting of water and an organic or inor... | 05/22/1979 |
| 4138212 | Process for producing water and oil soluble curcumin coloring agents Water soluble curcumin coloring agent is produced from ground turmeric root by washing the root with a soap solution in which the curcumin dissolves. A subsequent treatment of the solution with acid precipitates the curcumin and produces a paste or putty ... | 02/06/1979 |
| 4132793 | Stable red beet color composition Described is a novel composition of matter which is a natural red dyestuff composed of the ingredients: (i) a betalaine (red beet dye); (ii) Ascorbic acid or derivative or salt thereof (e.g. sodium ascorbate or isoascorbic acid [D-erythro-hex-2-enonic acid gam... | 01/02/1979 |
| 3963700 | Recovery of anthocyanin from plant sources A new anthocyanin recovery system from plant materials such as grape wastes based on tartaric acid-alkanol extraction followed by controlled precipitation of excess tartaric acid as potassium hydrogen tartrate is described. An artificial grape drink color... | 06/15/1976 |
