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Class Information
Number: 8/438
Name: Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers > Process of extracting or purifying of natural dye
Description: Processes directed to the extraction of coloring matter from natural materials or subsequent treatment to purify the same so as to put it in a form suitable for use as a dye.

Sub-classes under this class:

Class Number Class Name Patents
8/439 Logwood 1

Patents under this class:

Patent Number Title Of Patent Date Issued
8690966 Tobacco plant derived dye and process of making the same Apr. 8, 2014
8491670 Anthocyanin pigment/dye compositions and method of providing composition through extraction from corn Jul. 23, 2013
7682407 Textile dyeing method, dyed textile, and dye Mar. 23, 2010
7192456 Method of preparing a purified purple corn coloring agent Mar. 20, 2007
6749647 Fiber dyeing method and dyed fiber products Jun. 15, 2004
6443998 Trichromatic fiber dyeing processes and compositions thereof Sep. 3, 2002
6329010 Process for producing a food colorant, colorant thus obtained and uses thereof Dec. 11, 2001
6221417 Conversion of xanthophylls in plant material for use as a food colorant Apr. 24, 2001
6132791 Natural red sunflower anthocyanin colorant with naturally stabilized color qualities, and the process of making Oct. 17, 2000
5935168 Glutaraldehyde-fixed bioprostheses Aug. 10, 1999
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 Jul. 13, 1999
5750379 Process for the production of carthamin May. 12, 1998
5704950 Process for manufacturing food grade colors from flowers, typically hibiscus Jan. 6, 1998
5700464 Process for extracting with liquids soluble substances from subdivided solids Dec. 23, 1997
5244469 Process for preparation of black coloring materials and application thereof: chitosan treated with black extract of lithospermum root Sep. 14, 1993
5221289 Dyed textile products and a method of producing them Jun. 22, 1993
5221532 Coulteria tinctoria pod extract hair treatment composition Jun. 22, 1993
5210186 Method for recovery and separation of chitin, proteins and astaxanthin and esters thereof May. 11, 1993
5147673 Colorant based on carminic acid, method of preparation, and method of coloring a foodstuff Sep. 15, 1992
5042989 Process for producing luminescent dyestuffs from plant materials Aug. 27, 1991
5039536 Production and use of a high-intensity red natural colorant derived from carrot cell tissue cultures Aug. 13, 1991
4878921 Natural blue dye composition and colorant using the same: prepared by reacting taurine and genipin Nov. 7, 1989
4693892 Gelatin containing .beta.-carotene Sep. 15, 1987
4563193 Asymmetric 1:2 chrome complex dyes containing an azo and an azomethine compound Jan. 7, 1986
4500556 Anthocyanin colorant from grape pomace Feb. 19, 1985
4481226 Stabilized anthocyanin food colorant Nov. 6, 1984
4400400 Acid soluble blue colorant for food products Aug. 23, 1983
4383833 Natural edible dye preparation from bean husks giving red shades May. 17, 1983
4358286 Cosmetic hair dye composition based on a powder of vegetable origin Nov. 9, 1982
4302200 Process for extracting anthocyanin-type colors from natural products Nov. 24, 1981
4268265 Natural dyestuffs for gelatine capsules May. 19, 1981
4260388 Purification of anthocyan solutions Apr. 7, 1981
4238518 Process for the preparation of a stable Beta vulgaris extract Dec. 9, 1980
4204043 Method of removing pigment from annatto seed May. 20, 1980
4156077 Process for obtaining a dye substance of vegetal origin May. 22, 1979
4138212 Process for producing water and oil soluble curcumin coloring agents Feb. 6, 1979
4132793 Stable red beet color composition Jan. 2, 1979
3963700 Recovery of anthocyanin from plant sources Jun. 15, 1976

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