CPC Definition - Subclass A24D
This place covers:
Cigars, Cigarettes
Tobacco smoke filters
Manufacture of tobacco smoke filters or mouthpieces
In this place, the following terms or expressions are used with the meaning indicated:
Cigarette | "cigarette" means: (1) a small tube of wrapper containing tobacco or tobacco substitutes which people smoke by igniting it directly and where the tobacco (or the tobacco substitute) is burned; (2) in a broader sense it also means a small tube of wrapper containing tobacco or tobacco substitutes which is associated with a heat source at manufacturing or inserted by the user in a device containing a heat source, and where the tobacco (or the tobacco substitute) is heated without being burned. In this broader sense, the word "rod" is also often used in place of cigarette. |
Simulated smoking device | "simulated smoking devices" means devices simulating the act of smoking without burning tobacco, e.g. so called electronic cigarettes |
This place covers:
Cigars, Cigarettes as products per se
Attention is drawn to the following places, which may be of interest for search:
Filters | |
Manufacture of cigars or cigarettes | |
Pipes | |
Simulated smoking devices |
This place covers:
Cigars, Cigarettes in which the wrapper has a particular structure or composition.
Attention is drawn to the following places, which may be of interest for search:
Tobacco smoke filters with ventilation means | |
Treatment of cigarette papers |
This place covers:
Illustrative example of subject matter classified in this place:
The Figure illustrates a tobacco column (12) within a wrapper (14) comprising treated areas (24).
In this place, the following terms or expressions are used with the meaning indicated:
ignition propensity | capacity of a cigarette of burning through when left resting on a substrate without puffing |
In patent documents, the following abbreviations are often used:
LIP | Low ignition propensity, Low ignition proclivity |
This place does not cover:
With extensible mouthpieces |
Attention is drawn to the following places, which may be of interest for search:
Mouthpieces per se |
This place covers:
Smoking products combined with pyrophoric or easily ignitable material and products combined with match scratchers or analogous means
Attention is drawn to the following places, which may be of interest for search:
Pyrophoric compositions | |
Lighters per se |
This place covers:
Cigarettes to be inserted into simulated smoking devices where the cigarettes are heated by a heat source of the device.
Illustrative example of subject matter classified in this place:
The Figure illustrates cigarette (40), tobacco or tobacco substitute segment (42), hollow tube (44), filter (44), mouthpiece (48) and wrapper (50).
Attention is drawn to the following places, which may be of interest for search:
Making cigarettes for simulated smoking devices | |
Simulated smoking devices |
This place covers:
Cigarettes with an integrated combustible heat source which heats the tobacco (substitute) without burning it (to produce an aerosol) in the act of simulated smoking.
Illustrative example of subject matter classified in this place:
The Figure illustrates cigarette (2), heat source (4), tobacco or tobacco substitute segment (10), hollow tube (12), aerosol cooling element (14), spacer (16), mouthpiece, filter (18) and wrapper (20).
This place covers:
Filters for tobacco smoke, products per se and their manufacture.
Mouthpieces for cigars or cigarettes.
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 | |
Mouthpieces for pipes, for cigar or cigarette holders | |
Filters in general |
This place covers:
The production of tobacco smoke filters, e.g. from the filter tow bale to the final product.
Attention is drawn to the following places, which may be of interest for search:
When the process of manufacture confers to the final product a particular structure, then a class of A24D 3/04 should be given.
Attention is drawn to the following places, which may be of interest for search:
Transporting cigarettes during manufacture with lateral transferring means |
This place covers:
Control means for the filter manufacturing process.
Attention is drawn to the following places, which may be of interest for search:
Examining cigarettes or the rod |
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
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 |
This place covers:
Filters characterized by the presence of an additive in its constructional features.
Attention is drawn to the following places, which may be of interest for search:
Additive composition |
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
This place covers:
Material used in the tobacco smoke filter.
Chemical, structural or functional aspects of the material or additive.
Attention is drawn to the following places, which may be of interest for search:
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.
Attention is drawn to the following places, which may be of interest for search:
Constructional aspects of the filter itself |
capsules, sponge like material, (foam or cellular structure are also classified in A24D 3/066)
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.
Attention is drawn to the following places, which may be of interest for search:
Shape or structure of the filter itself |
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.
This place covers:
e.g. Y or C cross-section
This place covers:
Fibers with any composite structure, i.e. at least two distinctive regions, e.g. sheath/core.
Illustrative examples of subject matter classified in this place:
1. Sheath/core or hollow fibers
2. Bi-component fibers
Figure 2 illustrates bicomponent fibers distributed in striped (2A), segmented pie (2B, 2C), trilobal (2D), sheath-core (2E), islands in the sea (2F, 2G).
This place covers:
foam-like, cellular or porous material
This place covers:
Functional properties of the material, additive or the filter itself, e.g. biodegradable filter, disintegrative paper or disintegration enhancers.
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.
This place covers:
Biodegradability or ease of disintegration in the environment is an important feature of the material or filter itself.
This place does not cover:
Of ion exchange materials |
Attention is drawn to the following places, which may be of interest for search:
Organic compounds of undefined constitution, e.g. pine needle, cork, tobacco and other organic materials of undefined constitution obtained from animal or plants |
Synthetic products, generally polymeric. The material constitute the carrier or main component of the filter.
This place covers:
Cellulose, e.g. paper or derivative e.g. cellulose acetate
This place covers:
Enzymes or other microbial metabolite or extract thereof, e.g. bacterial extract.
This place covers:
Comprising inorganic material as main constituent or as additive.
Attention is drawn to the following places, which may be of interest for search:
Inorganic compounds of undefined constitution, e.g. sand, and other inorganic materials of undefined constitution obtained from animal or plants |
This place covers:
includes also silica, zeolites, aluminosilicates
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.
This group covers mouthpieces of cigarettes, whereas group A24F 7/00 covers the mouthpieces (usually made of plastic, wood or metal) for holders for cigars or cigarettes.
This place does not cover:
Manufacture of tobacco smoke filters |
Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:
Making tipping materials for, or attaching them to mouthpieces of, cigars or cigarettes |
Attention is drawn to the following places, which may be of interest for search:
Producing cigar or cigarette holders from plastics or substances in a plastic state |