Patent classifications
D
TEXTILES; PAPER
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D06
TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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D06L
DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
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4/00
Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
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D06L4/60
Optical bleaching or brightening
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D06L4/686
Fugitive optical brightening; Discharge of optical brighteners in discharge paste; Blueing; Differential optical brightening
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