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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
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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
}
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.
with special covers
A24D 1/022
. .
{
Papers for roll-your-own cigarettes (paper in general D21H)
}
. .
{
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
}
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A24D 1/04
.
with mouthpieces or filter-tips (mouthpieces, filter-tips per se A24D 3/00)
. .
{
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
}
.
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
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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)
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Manufacture of tobacco smoke filters (manufacture of paper or cellulosic materials for filters D21)
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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
}
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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)
}
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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
}
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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
}
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A24D 3/0275
. .
{
for filters with special features
}
A24D 3/0279
. . .
{
with tubes
}
A24D 3/0283
. . .
{
with means for a non-axial smoke flow
}
. . .
{
for composite filters
}
A24D 3/0291
. . .
{
for hollow tipped filters, e.g. recess filters
}
. .
{
Process control means
}
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Tobacco smoke filters characterised by their shape or structure
A24D 3/041
. .
{
with adjustable means for modifying the degree of filtration of the filter
}
. .
{
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
}
. .
{
containing additives (additive composition A24D 3/061)
}
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Use of materials for tobacco smoke filters
. .
{
containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking (constructional aspects of the filter A24D 3/048)
}
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. .
{
characterised by structural features
}
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A24D 3/063
. . .
{
of the fibers
}
. . . .
{
having non-circular cross-section
}
. . . .
{
with sheath/core of bi-component type structure
}
. . .
{
in the form of foam or having cellular structure
}
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. .
{
characterised by functional properties
}
. . .
{
Biodegradable or disintegrable
}
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. .
of organic materials as carrier or major constituent (of ion exchange materials A24D 3/12)
. . .
of cellulose or cellulose derivatives
A24D 3/12
. .
of ion exchange materials
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. .
of organic materials as additive (of ion exchange materials A24D 3/12)
. . .
{
Microbial metabolite, e.g. enzyme
}
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. .
of inorganic materials
. . .
{
Carbon
}
. . .
{
Silicic acid or silicates
}
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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
}
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Last Modified: 10/10/2013