Optical bleaching or brightening

Introduced: January 2017

Full Title

Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs > Optical bleaching or brightening

IPC and CPC are identically structured here. All 9 subcodes exist in both systems.

IPC defines codes here since 2017.

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D06L 4/607 in organic solvents since 2017 IPC+CPC Available in IPC and CPC
D06L 4/614 in aqueous solvents since 2017 IPC+CPC Available in IPC and CPC
D06L 4/643 wherein the brightener is introduced in a gaseous environment or in solid phase, e.g. by transfer, by use of powders or by use of super-critical fluids since 2017 IPC+CPC Available in IPC and CPC
D06L 4/65 with mixtures of optical brighteners since 2017 IPC+CPC Available in IPC and CPC
D06L 4/657 combined with other treatments, e.g. finishing, bleaching, softening, dyeing or pigment printing since 2017 IPC+CPC Available in IPC and CPC
D06L 4/664 Preparations of optical brighteners; Optical brighteners in aerosol form; Physical treatment of optical brighteners since 2017 IPC+CPC Available in IPC and CPC
D06L 4/671 Optical brightening assistants, e.g. enhancers or boosters since 2017 IPC+CPC Available in IPC and CPC
D06L 4/679 Fixing treatments in optical brightening, e.g. heating, steaming or acid shock since 2017 IPC+CPC Available in IPC and CPC
D06L 4/686 Fugitive optical brightening; Discharge of optical brighteners in discharge paste; Blueing; Differential optical brightening since 2017 IPC+CPC Available in IPC and CPC

Class D06,2013–2023, worldwide · Source: EPO PATSTAT

Class D06,2013–2023, worldwide · Source: EPO PATSTAT