WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

A24D　CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES

A24D 1/00 Cigars; Cigarettes

A24D 1/002 ・{with additives, e.g. for flavouring (preparing tobacco, e.g. flavouring, A24B)}

A24D 1/004 ・{with a filter located between tobacco rods}

A24D 1/006 ・{with reinforced extremities}

A24D 1/008 ・{dividable}

A24D 1/02 ・with special covers

A24D 1/022 ・・{Papers for roll-your-own cigarettes (paper in general D21H)}

A24D 1/025 ・・{the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity}

A24D 1/027 ・・{with ventilating means, e.g. perforations}

A24D 1/04 ・with mouthpieces or filter-tips (mouthpieces, filter-tips per se A24D 3/00)

A24D 1/042 ・・{with mouthpieces (A24D 1/047 takes precedence; mouthpieces per se A24D 3/18)}

A24D 1/045 ・・{with smoke filter means (A24D 1/047 takes precedence)}

A24D 1/047 ・・{extensible}

A24D 1/08 ・with lighting means (pyrophoric compositions C06C 15/00; lighters per se F23Q)

A24D 1/10 ・with extinguishers

A24D 1/12 ・with ash-retaining attachments, holders, or other equipment

A24D 1/14 ・Tobacco cartridges for pipes

A24D 1/16 ・Bands for cigars or cigarettes (machines for applying bands B65C)

A24D 1/18 ・Selection of materials, other than tobacco, suitable for smoking

A24D 3/00 Tobacco smoke filters, e.g. filter-tips, filtering inserts (filters in general B01D); Mouthpieces for cigars or cigarettes (for pipes, for cigar or cigarette holders A24F 7/00)

A24D 3/02 ・Manufacture of tobacco smoke filters (manufacture of paper or cellulosic materials for filters D21)

A24D 3/0204 ・・{Preliminary operations before the filter rod forming process, e.g. crimping, blooming (A24D 3/0275 takes precedence)}

A24D 3/0208 ・・・{Cutting filter materials}

A24D 3/0212 ・・・{Applying additives to filter materials}

A24D 3/0216 ・・・・{the additive being in the form of capsules, beads or the like}

A24D 3/022 ・・・・{with liquid additives, e.g. application of plasticisers}

A24D 3/0225 ・・・・{with solid additives, e.g. incorporation of a granular product (A24D 3/0216 takes precedence)}

A24D 3/0229 ・・{Filter rod forming processes (A24D 3/0275 takes precedence)}

A24D 3/0233 ・・・{by means of a garniture}

A24D 3/0237 ・・・{by extrusion}

A24D 3/0241 ・・・{by compacting particulated materials}

A24D 3/0245 ・・・{by winding, e.g. spirally}

A24D 3/025 ・・{Final operations, i.e. after the filter rod forming process (A24D 3/0275 takes precedence)}

A24D 3/0254 ・・・{Cutting means}

A24D 3/0258 ・・・{Means for making grooves}

A24D 3/0262 ・・・{Filter extremity shaping and compacting means}

A24D 3/0266 ・・・{Rolling means}

A24D 3/027 ・・{Multiple line manufacturing devices}

A24D 3/0275 ・・{for filters with special features}

A24D 3/0279 ・・・{with tubes}

A24D 3/0283 ・・・{with means for a non-axial smoke flow}

A24D 3/0287 ・・・{for composite filters}

A24D 3/0291 ・・・{for hollow tipped filters, e.g. recess filters}

A24D 3/0295 ・・{Process control means}

A24D 3/04 ・Tobacco smoke filters characterised by their shape or structure

A24D 3/041 ・・{with adjustable means for modifying the degree of filtration of the filter}

A24D 3/043 ・・{with ventilation means, e.g. air dilution (A24D 3/041 takes precedence)}

A24D 3/045 ・・{with smoke acceleration means, e.g. impact-filters}

A24D 3/046 ・・{with electrical or magnetical filtering means}

A24D 3/048 ・・{containing additives (additive composition A24D 3/061)}

A24D 3/06 ・Use of materials for tobacco smoke filters

A24D 3/061 ・・{containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking (constructional aspects of the filter A24D 3/048)}

A24D 3/062 ・・{characterised by structural features}

A24D 3/063 ・・・{of the fibers}

A24D 3/064 ・・・・{having non-circular cross-section}

A24D 3/065 ・・・・{with sheath/core of bi-component type structure}

A24D 3/066 ・・・{in the form of foam or having cellular structure}

A24D 3/067 ・・{characterised by functional properties}

A24D 3/068 ・・・{Biodegradable or disintegrable}

A24D 3/08 ・・of organic materials as carrier or major constituent (of ion exchange materials A24D 3/12)

A24D 3/10 ・・・of cellulose or cellulose derivatives

A24D 3/12 ・・of ion exchange materials

A24D 3/14 ・・of organic materials as additive (of ion exchange materials A24D 3/12)

A24D 3/145 ・・・{Microbial metabolite, e.g. enzyme}

A24D 3/16 ・・of inorganic materials

A24D 3/163 ・・・{Carbon}

A24D 3/166 ・・・{Silicic acid or silicates}

A24D 3/18 ・Mouthpieces for cigars or cigarettes; Manufacture thereof (A24D 3/02 takes precedence; making tipping materials for, or attaching them to mouthpieces of, cigars or cigarettes A24C 5/56; producing cigar or cigarette holders from plastics or from substances in a plastic state B29D 23/14; manufacture from metal, see the relevant subclasses of Section B)

A24D 3/185 ・・{with a straw-like insert, e.g. Virginia cigars}