Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/20—Cigarettes specially adapted for simulated smoking devices
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes

Definitions

• the present disclosure relates to a consumable for use in a smoking substitute system and particularly, although not exclusively, to a heat-not-burn (HNB) consumable.
• HNB heat-not-burn
• the smoking of tobacco is generally considered to expose a smoker to potentially harmful substances. It is generally thought that a significant amount of the potentially harmful substances are generated through the heat caused by the burning and/or combustion of the tobacco and the constituents of the burnt tobacco in the tobacco smoke itself.
• Conventional combustible smoking articles such as cigarettes, typically comprise a cylindrical rod of tobacco comprising shreds of tobacco which is surrounded by a wrapper, and usually also a cylindrical filter axially aligned in an abutting relationship with the wrapped tobacco rod.
• the filter typically comprises a filtration material which is circumscribed by a plug wrap.
• the wrapped tobacco rod and the filter are joined together by a wrapped band of tipping paper that circumscribes the entire length of the filter and an adjacent portion of the wrapped tobacco rod.
• a conventional cigarette of this type is used by lighting the end opposite to the filter, and burning the tobacco rod. The smoker receives mainstream smoke into their mouth by drawing on the mouth end or filter end of the cigarette.
• Such smoking substitute systems can form part of nicotine replacement therapies aimed at people who wish to stop smoking and overcome a dependence on nicotine.
• Smoking substitute systems include electronic systems that permit a user to simulate the act of smoking by producing an aerosol (also referred to as a“vapour”) that is drawn into the lungs through the mouth (inhaled) and then exhaled.
• aerosol also referred to as a“vapour”
• the inhaled aerosol typically bears nicotine and/or flavourings without, or with fewer of, the odour and health risks associated with traditional smoking.
• smoking substitute systems are intended to provide a substitute for the rituals of smoking, whilst providing the user with a similar experience and satisfaction to those experienced with traditional smoking and with combustible tobacco products.
• Some smoking substitute systems use smoking substitute articles that are designed to resemble a traditional cigarette and are cylindrical in form with a mouthpiece at one end.
• HNB heat not burn
• a typical HNB smoking substitute system may include a device and a consumable.
• the consumable may include the tobacco material.
• the device and consumable may be configured to be physically coupled together.
• heat may be imparted to the tobacco material by a heating element of the device, wherein airflow through the tobacco material causes moisture in the tobacco material to be released as vapour.
• a vapour may also be formed from a carrier in the tobacco material (this carrier may for example include propylene glycol and/or vegetable glycerine) and additionally volatile compounds released from the tobacco. The released vapour may be entrained in the airflow drawn through the tobacco.
• the vapour As the vapour passes through the consumable (entrained in the airflow) from an inlet to a mouthpiece (outlet), the vapour cools and condenses to form an aerosol for inhalation by the user.
• the aerosol will normally contain the volatile compounds. In some cases it may be desirable to maximise the cooling of the vapour so as to facilitate the condensation of the vapour into an aerosol.
• HNB smoking substitute systems heating as opposed to burning the tobacco material is believed to cause fewer, or smaller quantities, of the more harmful compounds ordinarily produced during smoking. Consequently, the HNB approach may reduce the odour and/or health risks that can arise through the burning, combustion and pyrolytic degradation of tobacco.
• the aerosol passing from the mouthpiece may not be in a desirable state.
• an aerosol-forming article e.g. a smoking substitute article such as an HNB consumable comprising a cooling element formed of a plastics material.
• an aerosol-forming article e.g. a smoking substitute article such as a HNB consumable
• a downstream cooling element formed of a granular or foamed plastics material
• a cooling element comprising a granular or foamed plastics material results in a large surface area for effecting cooling of a vapour/aerosol (by heat transfer between the granules/foam and vapour/aerosol).
• the granular plastics material may be combined so as to form a unitary structure.
• the granules may be compressed together so as to form the cooling element.
• the granules may be compressed so as to be formed into a structure having a plurality of channels extending therethrough. Due to the nature of the granules, the channels may be formed in a random manner (i.e. the cooling element may comprise a network of channels arranged in a substantially random manner).
• the granular plastics material may be contained within a containment sleeve e.g. a paper or cardboard or plastics material containment sleeve.
• the plastic material foam may be formed of an expanded plastic material. It preferably has an open-cell structure.
• the open cell structure may be formed by incorporating insert gas into a resinous or molten plastics material under pressure and then releasing the gas/plastics material mixing to atmospheric pressure prior to curing.
• the plastics material may comprise polylactic acid (PLA) e.g. biodegradable-PLA.
• PLA polylactic acid
• the plastics material (and consequently, the cooling element) may be biodegradable.
• the cooling element may solely be formed of PLA, or may be formed of PLA in combination with another material (e.g. another plastics material).
• the cooling element may alternatively or additionally be formed of a plastics material selected from the group consisting of polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).
• the cooling element may comprise an additive.
• the additive may comprise a flavourant.
• the flavourant may be dispersed from the cooling element to vapour/aerosol flowing through the cooling element.
• the flavourant that is dispersed to the vapour may thus alter the flavour of the vapour prior to it being inhaled by a user.
• the flavourant may be provided in solid or liquid form. It may include menthol, liquorice, chocolate, fruit flavour (including e.g. citrus, cherry etc.), vanilla, spice (e.g. ginger, cinnamon) and tobacco flavour.
• the flavourant may be evenly dispersed throughout the cooling element or may be provided in isolated locations and/or varying concentrations throughout the cooling element.
• the additive may be sprayed or coated onto the cooling element (e.g. granules or foam).
• the cooling element comprises a granular plastics material
• the additive may be applied (e.g. sprayed or coated) onto the granules prior to the granules being combined to form the cooling element e.g. by compression or containment within a sleeve.
• the additive may be applied by injecting the additive into the cooling element.
• the additive may be applied by way of impregnation of the additive in the cooling element.
• the porous nature of a cooling element formed of a foam may be suited to impregnation of the additive.
• the additive may be in the form of a thread passed through the cooling element.
• the thread may be formed into the cooling element.
• the thread may be compressed together with the granules to form the cooling element.
• the cooling element may have a generally cylindrical form.
• the cooling element may have an external diameter of between 5 and 10mm e.g. between 6 and 9mm or 6 and 8mm e.g. around 7 mm. It may have an axial length of between 5 and 15 mm e.g. between 6 and 15 mm or between 7 and 14mm e.g. around 14mm.
• the cooling element may comprise a bore extending longitudinally therethrough.
• the bore may extend along a central longitudinal axis of the cooling element.
• the bore may have a circular transverse cross-section or may have a square, triangular, elliptical, etc. cross section.
• the ratio of the diameter of the bore to the diameter of the cooling element may be between 0.5:1 and 0.9:1 , e.g. between 0.6:1 and 0.8:1.
• the diameter of the bore may be between 2 and 6 mm, e.g. between 4 and 6 mm, e.g. 5 and 6 mm.
• the aerosol-forming article is preferably a heat-not-burn (HNB) consumable.
• the aerosol-forming substrate is capable of being heated to release at least one volatile compound that can form an aerosol.
• the aerosol-forming substrate may be located at the upstream end of the article/consumable.
• the terms’’’upstream” and“downstream” are intended to refer to the flow direction of the vapour/aerosol i.e. with the downstream end of the article/consumable being the mouth end or outlet where the aerosol exits the article/consumable for inhalation by the user.
• the upstream end of the article/consumable is the opposing end to the downstream end.
• the aerosol-forming substrate comprises at least one volatile compound that is intended to be vaporised/aerosolised and that may provide the user with a recreational and/or medicinal effect when inhaled.
• Suitable chemical and/or physiologically active volatile compounds include the group consisting of: nicotine, cocaine, caffeine, opiates and opoids, cathine and cathinone, kavalactones, mysticin, beta-carboline alkaloids, salvinorin A together with any combinations, functional equivalents to, and/or synthetic alternatives of the foregoing.
• the aerosol-forming substrate may comprise plant material.
• the plant material may comprise least one plant material selected from the list including Amaranthus dubius, Arctostaphylos uva-ursi (Bearberry), Argemone mexicana, Arnica, Artemisia vulgaris, Yellow Tees, Galea zacatechichi, Canavalia maritima (Baybean), Cecropia mexicana (Guamura), Oestrum noctumum, Cynoglossum virginianum (wild comfrey), Cytisus scoparius, Damiana, Entada rheedii, Eschscholzia califomica (California Poppy), Fittonia albivenis, Hippobroma longi flora, Humulus japonica (Japanese Hops), Humulus lupulus (Hops), Lactuca virosa (Lettuce Opium), Laggera alata, Leono
• the plant material is tobacco.
• Any type of tobacco may be used. This includes, but is not limited to, flue-cured tobacco, burley tobacco, Maryland Tobacco, dark-air cured tobacco, oriental tobacco, dark-fired tobacco, perique tobacco and rustica tobacco. This also includes blends of the above mentioned tobaccos.
• Any suitable parts of the tobacco plant may be used. This includes leaves, stems, roots, bark, seeds and flowers.
• the tobacco may comprise one or more of leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenised tobacco, shredded tobacco, extruded tobacco, cut rag tobacco and/or reconstituted tobacco (e.g. slurry recon or paper recon).
• the aerosol-forming substrate may comprise a gathered sheet of homogenised (e.g. paper/slurry recon) tobacco or gathered shreds/strips formed from such a sheet.
• homogenised e.g. paper/slurry recon
• the sheet used to form the aerosol-forming substrate has a grammage greater than or equal to 100 g/m 2 , e.g. greater than or equal to 110 g/m 2 such as greater than or equal to 120 g/m 2 .
• the sheet may have a grammage of less than or equal to 300 g/m 2 e.g. less than or equal to 250 g/m 2 or less than or equal to 200 g/m 2 .
• the sheet may have a grammage of between 120 and 190 g/m 2 .
• the aerosol-forming substrate may comprise at least 50 wt% plant material, e.g. at least 60 wt% plant material e.g. around 65 wt% plant material.
• the aerosol-forming substrate may comprise 80 wt% or less plant material e.g. 75 or 70 wt% or less plant material.
• the aerosol-forming substrate may comprise one or more additives selected from humectants, flavourants, fillers, aqueous/non-aqueous solvents and binders.
• Humectants are provided as vapour generators - the resulting vapour helps carry the volatile active compounds and increases visible vapour.
• Suitable humectants include polyhydric alcohols (e.g. propylene glycol (PG), triethylene glycol, 1 ,2-butane diol and vegetable glycerine (VG)) and their esters (e.g. glycerol mono-, di- or tri-acetate). They may be present in the aerosol-forming substrate in an amount between 1 and 50 wt%.
• the humectant content of the aerosol-forming substrate may have a lower limit of at least 1 % by weight of the plant material, such as at least 2 wt %, such as at least 5 wt %, such as at least 10 wt %, such as at least 20 wt %, such as at least 30 wt %, or such as least 40 wt %.
• the humectant content of the aerosol-forming substrate may have an upper limit of at most 50 % by weight of the plant material, such as at most 40 wt %, such as at most 30 wt %, or such as at most 20 wt %.
• the humectant content is 1 to 40 wt % of the aerosol-forming substrate, such as 1 to 20 wt %
• Suitable binders are known in the art and may act to bind together the components forming the aerosolforming substrate.
• Binders may comprise starches and/or cellulosic binders such as methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose and methyl cellulose, gums such as xanthan, guar, arabic and/or locust bean gum, organic acids and their salts such as alginic acid/ sodium alginate, agar and pectins.
• the binder content is 5 to 10 wt% of the aerosol-forming substrate e.g. around 6 to 8 wt%.
• Suitable fillers are known in the art and may act to strengthen the aerosol-forming substrate.
• Fillers may comprise fibrous (non-tobacco) fillers such as cellulose fibres, lig nocellulose fibres (e.g. wood fibres), jute fibres and combinations thereof.
• the filler content is 5 to 10 wt% of the aerosol-forming substrate e.g. around 6 to 9 wt%.
• the aerosol-forming substrate may comprise an aqueous and/or non-aqueous solvent.
• the aerosol forming substrate has a water content of between 5 and 10 wt% e.g. between 6-9 wt% such as between 7-9 wt%.
• the flavourant may be provided in solid or liquid form. It may include menthol, liquorice, chocolate, fruit flavour (including e.g. citrus, cherry etc.), vanilla, spice (e.g. ginger, cinnamon) and tobacco flavour.
• the flavourant may be evenly dispersed throughout the aerosol-forming substrate or may be provided in isolated locations and/or varying concentrations throughout the aerosol-forming substrate.
• the aerosol-forming substrate may be formed in a substantially cylindrical shape such that the article/consumable resembles a conventional cigarette. It may have a diameter of between 5 and 10mm e.g. between 6 and 9mm or 6 and 8mm e.g. around 7 mm. It may have an axial length of between 10 and 15mm e.g. between 11 and 14mm such as around 12 or 13mm.
• the aerosol-forming substrate may be at least partly circumscribed by a wrapping layer e.g. a paper wrapping layer.
• the wrapping layer may overlie an inner foil layer or may comprise a paper/foil laminate (with the foil innermost).
• the article/consumable may comprise at least one filter element.
• the cooling element and/or upstream filter element may be at least partly (e.g. entirely) circumscribed by the (paper) wrapping layer.
• the or at least one of the filter element(s) e.g. the terminal filter element/upstream filter element
• the at least one filter element e.g. the terminal filter element/upstream filter element
• the at least one filter element may be comprised of activated charcoal.
• the at least one of the filter elements e.g. the terminal element/upstream filter element
• the or at least one of the filter elements may be comprised of plant material e.g. extruded plant material.
• the or each filter element may be circumscribed with a plug wrap e.g. a paper plug wrap.
• the or each filter element may have a substantially cylindrical shape with a diameter substantially matching the diameter of the aerosol-forming substrate (with or without its associated wrapping layer).
• the axial length of the or each filter element may be less than 20mm, e.g. between 8 and 15mm, for example between 9 and 13 mm e.g. between 10 and 12mm.
• the or at least one of the filter element(s) may be a solid filter element.
• the or at least one of the filter element(s) may be a hollow bore filter element.
• the or each hollow bore filter element may have a bore diameter of between 1 and 5 mm, e.g. between 2 and 4 mm or between 2 and 3 mm.
• the terminal filter element (at the downstream end of the article/consumable) may be joined to the upstream elements forming the article/consumable by a circumscribing tipping layer e.g. a tipping paper layer.
• the tipping paper may have an axial length longer than the axial length of the terminal filter element such that the tipping paper completely circumscribes the terminal filter element plus the wrapping layer surrounding any adjacent upstream element.
• the or at least one of the filter elements e.g. the terminal filter element may include a capsule e.g. a crushable capsule (crush-ball) containing a liquid flavourant e.g. any of the flavourants listed above.
• the capsule can be crushed by the user during smoking of the article/consumable to release the flavourant.
• the capsule may be located at the axial centre of the filter element.
• the bore of the cooling element may have a larger diameter than the bore of the terminal filter element.
• the bore of the cooling element may have a larger diameter than the bore of the upstream filter element.
• the article/consumable may comprise a spacer element that defines a space or cavity or chamber between the aerosol-forming substrate and the downstream end of the article/consumable. For example, it may be provided between the aerosol-forming substrate and the upstream filter element and/or between the upstream filter element and the cooling element filter.
• the spacer acts to allow both cooling and mixing of the aerosol.
• the spacer element may be a tubular spacer element e.g. it may comprise a cardboard tube.
• the spacer element may be at least partly (e.g. entirely) circumscribed by the (paper) wrapping layer.
• the spacer element may have an external diameter of between 5 and 10mm e.g. between 6 and 9mm or 6 and 8mm e.g. around 7 mm. It may have an axial length of between 5 and 10 mm e.g. between 5 and 8 mm or between 6 and 8mm e.g. around 7 mm.
• a smoking substitute system comprising an aerosol-forming article according to the first aspect and a device comprising a heating element.
• the device may be a HNB device i.e. a device adapted to heat but not combust the aerosol-forming substrate.
• the device may comprise a main body for housing the heating element.
• the heating element may comprise an elongated e.g. rod, tube-shaped or blade heating element.
• the heating element may project into or surround a cavity within the main body for receiving the article/consumable described above.
• the device e.g. the main body
• an electrical power supply e.g. a (rechargeable) battery for powering the heating element.
• It may further comprise a control unit to control the supply of power to the heating element.
• a method of using a smoking substitute system comprising: inserting the article/consumable into the device; and heating the article/consumable using the heating element.
• the method comprises inserting the article/consumable into a cavity within the main body and penetrating the article/consumable with the heating element upon insertion of the article/consumable.
• the heating element may penetrate the aerosol-forming substrate in the article/consumable.
• Figure 1 shows a first embodiment of an HNB consumable
• FIG. 2 shows a second embodiment of an HNB consumable
• Figure 3 shows a third embodiment of an HNB consumable
• Figure 4 shows the first embodiment within a device forming an HNB system.
• the HNB consumable 1 comprises an aerosol-forming substrate 2 at the upstream end of the consumable 1.
• the aerosol-forming substrate comprises reconstituted tobacco which includes nicotine as a volatile compound.
• the aerosol-forming substrate 2 comprises 65 wt% tobacco which is provided in the form of gathered shreds produced from a sheet of slurry/paper recon tobacco.
• the tobacco is dosed with 20wt% of a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt%.
• a humectant such as propylene glycol (PG) or vegetable glycerine (VG) and has a moisture content of between 7-9 wt%.
• the aerosol-forming substrate further comprises cellulose pulp filler and guar gum binder.
• the aerosol-forming substrate 2 is formed in a substantially cylindrical shape such that the consumable resembles a conventional cigarette. It has diameter of around 7mm and an axial length of around 12 mm.
• the aerosol-forming substrate 2 is circumscribed by a paper wrapping layer 3.
• the consumable 1 comprises an upstream filter element 4 and a downstream (terminal) filter element 5. Both filter elements 4, 5 are formed of cellulose acetate tow and wrapped with a respective paper plug layer (not shown).
• Both filter elements 4, 5 have a substantially cylindrical shape.
• the diameter of the upstream filter 4 matches the diameter of the aerosol-forming substrate 2.
• the diameter of the terminal filter element 5 is slightly larger and matches the combined diameter of the aerosol-forming substrate 2 and the wrapping layer 3.
• the upstream filter element is slightly shorter in axial length than the terminal filter element at an axial length of 10mm compared to 12mm for the terminal filter element.
• the two filter elements 4, 5 are spaced by a cooling element 6 comprising a polylactic acid (PLA) based foam having a cylindrical form.
• the cooling element 6 is longer than each of the two filter elements having an axial length of around 14mm.
• the cooling element 6 comprises an open cell foam comprising a plurality of channels that permit the passage of vapour (i.e. from the substrate 2) through the cooling element 6. Heat exchange between the vapour and the cooling element 6 may cool the vapour so as to cause it to condense.
• Each filter element 4, 5 is a hollow bore filter element with a hollow, longitudinally extending bore 8, 9.
• the diameter of the bore 8 in the upstream filter 4 is slightly larger than the diameter of the bore 9 in the terminal filter 5 having a diameter of 3mm compared to 2 mm for the terminal filter element 5.
• the cooling element 6 and the upstream filter element 4 are circumscribed by the wrapping layer 3.
• the terminal filter element 5 is joined to the upstream elements forming the consumable by a circumscribing paper tipping layer 7.
• the tipping layer 7 encircles the terminal filter element 5 and has an axial length of around 20mm such that it overlays a portion of the cooling element.
• FIG 2 shows a second embodiment of a consumable T which is generally same as that shown in Figure 1 except that the consumable 1’ comprises a spacer tube 8 between the terminal filter element 5 and the cooling element 6’.
• the spacer tube 9 acts to allow both mixing and cooling of the aerosol (or vapour).
• the cooling element 6’ is shorter than in the previously described embodiment.
• the cardboard spacer tube 9 and the cooling element 6’ are approximately the same length, and each have an axial length of around 7 mm.
• the cardboard spacer tube 9 and the cooling element 6’ are circumscribed by the wrapping layer 3.
• the cooling element 6’ is formed of PLA granules that are compressed into a cylindrical form.
• the granules define a plurality of channels that extend through the cooling element 6’ so as to permit the passage of vapour through the cooling element 6’
• the terminal filter element 5 is a solid filter element and comprises a crushable capsule 10 (crush-ball) having a shell wall containing a liquid menthol or cherry or vanilla flavourant.
• the capsule 10 is spherical and has a diameter of 3.5mm. It is positioned within the axial centre of the terminal filter element 5.
• Figure 3 shows a third embodiment of a consumable 1” which is the same as the first embodiment except that the cooling element 6” comprises a bore 11 , and the wrapping layer 3 does not completely circumscribe the cooling element 6”.
• the cooling element 6” is formed of PLA granules compressed into a tubular form (i.e. a cylindrical form with a centrally extending bore 10).
• the bore 10 has a circular transverse profile with a larger diameter than the bores 8, 9 of the upstream 4 and terminal 5 filters.
• the diameter of the bore 10 of the cooling element 6” is 5 mm.
• Figure 4 shows the first embodiment inserted into an HNB device 12 comprising a rod-shaped heating element 20.
• the heating element 20 projects into a cavity 13 within the main body 14 of the device.
• the consumable 1 is inserted into the cavity 13 of the main body 14 of the device 12 such that the heating rod 20 penetrates the aerosol-forming substrate 2.
• Heating of the reconstituted tobacco in the aerosolforming substrate 2 is effected by powering the heating element (e.g. with a rechargeable battery (not shown)).
• the heating element e.g. with a rechargeable battery (not shown)
• moisture and volatile compound e.g. nicotine
• the humectant are released as a vapour and entrained within an airflow generated by inhalation by the user at the terminal filter element 5.
• the vapour cools within the upstream filter element 4 and the cooling element 6, it condenses to form an aerosol containing the volatile compounds for inhalation by the user.
• Ranges may be expressed herein as from“about” one particular value, and/or to“about” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by the use of the antecedent“about,” it will be understood that the particular value forms another embodiment.
• the term“about” in relation to a numerical value is optional and means, for example, +/- 10%.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=64560378

Family Applications (1)

Country Status (3)

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Family Cites Families (5)

• 2018
  • 2018-10-29 GB GBGB1817548.9A patent/GB201817548D0/en not_active Ceased
• 2019
  • 2019-10-25 WO PCT/EP2019/079279 patent/WO2020089119A1/en unknown
  • 2019-10-25 EP EP19798010.5A patent/EP3873273A1/de active Pending

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