Cooperative Patent Classification


CPC Definition - Subclass A24D

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Last Updated Version: 2016.11
CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
Definition statement

This place covers:

Cigars, Cigarettes

Tobacco smoke filters

Manufacture of tobacco smoke filters or mouthpieces

Cigars; Cigarettes
Definition statement

This place covers:

Cigars, Cigarettes as products per se

References
Limiting references

This place does not cover:

Manufacture of cigars or cigarettes

Electronic or imitation cigarettes

Informative references

Attention is drawn to the following places, which may be of interest for search:

Filters

Pipes

with special covers
Definition statement

This place covers:

Cigars, Cigarettes in which the wrapper has a particular structure or composition.

References
Limiting references

This place does not cover:

Tobacco smoke filters with ventilation means

Informative references

Attention is drawn to the following places, which may be of interest for search:

Treatment of cigarette papers

{the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity}
Definition statement

This place covers:

US20030136420 A1

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Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Ignition propensity

the capacity of a cigarette of burning through when left resting on a substrate without puffing

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

LIP

Low ignition propensity, Low ignition proclivity

{with mouthpieces (A24D 1/047 takes precedence; mouthpieces per se A24D 3/18)}
References
Limiting references

This place does not cover:

With extensible mouthpieces

Informative references

Attention is drawn to the following places, which may be of interest for search:

Mouthpieces per se

with lighting means (pyrophoric compositions C06C 15/00; lighters per se F23Q)
Definition statement

This place covers:

Smoking products combined with pyrophoric or easily ignitable material and products combined with match scratchers or analogous means

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Pyrophoric compositions

Lighters per se

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)
Definition statement

This place covers:

Filters for tobacco smoke, products per se and their manufacture

Mouthpieces for cigars or cigarettes

References
Limiting references

This place does not cover:

Mouthpieces for pipes, for cigar or cigarette holders

Informative references

Attention is drawn to the following places, which may be of interest for search:

Special covers for cigarettes, cigars

Pneumatic transport of filters from the filter maker to the filter attaching machines

Filters in general

Manufacture of tobacco smoke filters (manufacture of paper or cellulosic materials for filters D21)
Definition statement

This place covers:

The production of tobacco smoke filters, e.g. from the filter tow bale to the final product

References
Limiting references

This place does not cover:

Attaching filters to the cigarette rod

Manufacture of paper or cellulosic material

Special rules of classification

When the process of manufacture confers to the final product a particular structure, then a class of A24D 3/04 should be given.

{for composite filters}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Transporting cigarettes during manufacture with lateral transferring means

{Process control means}
Definition statement

This place covers:

Control means for the filter manufacturing process.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Examining cigarettes or the rod

Tobacco smoke filters characterised by their shape or structure
Definition statement

This place covers:

The tobacco smoke filter as a product, eventually incorporated in a smoking article

Mechanical or structural aspects of the finished filter product

References
Limiting references

This place does not cover:

Manufacture of tobacco smoke filters

Chemical aspects of filter materials

Informative references

Attention is drawn to the following places, which may be of interest for search:

Structural features of the filter material itself or of a filter additive

{with ventilation means, e.g. air dilution (A24D 3/041 takes precedence)}
References
Limiting references

This place does not cover:

Adjustable means for modifying the degree of filtration of the filter

{containing additives (additive composition A24D 3/061)}
Definition statement

This place covers:

Filters characterized by the presence of an additive in its constructional features.

References
Limiting references

This place does not cover:

Additive composition

Special rules of classification

When the additive to the filter is incorporated in the tipping paper, the document should be classified also in A24D 1/02 (special covers for cigarettes)

This class takes precedence over A24B 15/282 (treatment of tobacco products by chemical substances, the action of which being delayed by indirect addition of the chemical substances

Use of materials for tobacco smoke filters
Definition statement

This place covers:

Material used in the tobacco smoke filter.

Chemical, structural or functional aspects of the material or additive.

References
Limiting references

This place does not cover:

Manufacture of tobacco smoke filters

Shape or structure of tobacco smoke filter itself

Special rules of classification

This group comprises materials including natural organic or inorganic compounds of undefined constitution e.g. tobacco, sand, pine needles, cork and other materials of undefined constitution obtained from animal or plants

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

Attention is drawn to the following places, which may be of interest for search:

Constructional aspects of the filter itself

Special rules of classification

capsules, sponge like material, (foam or cellular structure are also classified in A24D 3/066)

{characterised by structural features}
Definition statement

This place covers:

Structural features of the material itself or the additive (other than fibers), e.g. foam like material, particle size or shape of granular additives.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Shape or structure of the filter itself

Special rules of classification

Documents in these subgroups are also classified in subgroups A24D 3/06 and A24D 3/08-A24D 3/163, according to the chemical nature of the material or additive. Double classification is therefore necessary.

{having non-circular cross-section}
Definition statement

This place covers:

e.g. Y or C cross-section

{with sheath/core of bi-component type structure}
Definition statement

This place covers:

Fibers with any composite structure, i.e.at least two distinctive regions e.g. sheath/core

media1.png

Figure taken from patent application US2008149119 from PHILIP MORRIS USA INC

Sheath/core type or hollow fibers.

Bi-component type fibers:

media2.png

Figure taken from patent application WO2013019413 from R.J. REYNOLDS TOBACCO COMPANY

{in the form of foam or having cellular structure}
Definition statement

This place covers:

foam-like, cellular or porous material

{characterised by functional properties}
Definition statement

This place covers:

Functional properties of the material, additive or the filter itself, e.g. biodegradable filter, disintegrative paper or disintegration enhancers.

Special rules of classification

Documents in these subgroups are also classified in subgroups A24D 3/06 and A24D 3/08-A24D 3/163, according to the chemical nature of the material or additive. Double classification is therefore necessary.

{Biodegradable or disintegrable}
Definition statement

This place covers:

Biodegradability or ease of disintegration in the environment is an important feature of the material or filter itself.

of organic materials as carrier or major constituent (of ion exchange materials A24D 3/12)
References
Limiting references

This place does not cover:

Organic compounds of undefined constitution e.g. pine needle, cork, tobacco, and other organic materials of undefined constitution obtained from animal or plants

Of ion exchange materials

Special rules of classification

Synthetic products, generally polymeric. The material constitute the carrier or main component of the filter.

of cellulose or cellulose derivatives
Definition statement

This place covers:

Cellulose, e.g. paper or derivative e.g. cellulose acetate

of organic materials as additive (of ion exchange materials A24D 3/12)
Definition statement

This place covers:

Organic additive, e.g. flavouring agent,

References
Limiting references

This place does not cover:

Of ion exchange materials

{Microbial metabolite, e.g. enzyme}
Definition statement

This place covers:

Enzymes or other microbial metabolite or extract thereof, e.g. bacterial extract.

of inorganic materials
Definition statement

This place covers:

Comprising inorganic material as main constituent or as additive

References
Limiting references

This place does not cover:

Inorganic compounds of undefined constitution e.g. sand, and other inorganic materials of undefined constitution obtained from animal or plants

{Carbon}
Definition statement

This place covers:

Carbon, generally active carbon.

{Silicic acid or silicates}
Definition statement

This place covers:

includes also silica, zeolites, aluminosilicates

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)
Definition statement

This place covers:

elements adapted to be inserted at the mouth end of cigar or cigarettes, usually but not necessarily having filtering action, e.g. elements for smoking Russian cigarettes.

References
Limiting references

This place does not cover:

Manufacture of tobacco smoke filters

Informative references

Attention is drawn to the following places, which may be of interest for search:

Making tipping materials for, or attaching them to mouthpieces of, cigars or cigarettes

Producing cigar or cigarette holders from plastics or substances in a plastic state