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| Number | Title | Issue Date |
| 7997282 | Cigarette filter with beaded carbon A smoking article such as a cigarette comprises a tobacco rod and a filter component having a cavity filled with spherical beaded carbon. As mainstream tobacco smoke is drawn through the filter component, targeted gas phase smoke constituents are removed as the smok... | 08/16/2011 |
| 7987857 | Multi-component filter providing multiple flavour enhancement A multi-component filter for a smoking article comprises: a mouth end segment; a first flavor release segment comprising plant leaf upstream of the mouth end segment; and a second flavor release segment comprising filtration material and a flavorant upstream of the ... | 08/02/2011 |
| 7856991 | Filter cigarette A filter cigarette comprising a tobacco rod which is circumscribed by a cigarette paper and a filter, said filter comprising a tobacco-side filter element and a mouth-side filter element, said filter cigarette having a diameter of about 4 mm to about 7 mm, yielding ... | 12/28/2010 |
| 7856990 | Filtered cigarette incorporating an adsorbent material A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or mo... | 12/28/2010 |
| 7699061 | Multi-component filter providing multiple flavour enhancement A multi-component filter for a smoking article comprises: a mouth end segment; a first flavour release segment comprising plant leaf upstream of the mouth end segment; and a second flavour release segment comprising filtration material and a flavourant upstream of t... | 04/20/2010 |
| 7669604 | Filtered cigarette incorporating an adsorbent material A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or mo... | 03/02/2010 |
| 7303683 | Microorganism-removing filter medium having high isoelectric material and low melt index binder A filter medium capable of removing microorganisms from a fluid such as water. The filter medium includes particles of activated carbon, particles of a substantially insoluble inorganic material having an isoelectric point greater than the fluid being filtered. A lo... | 12/04/2007 |
| 7243659 | Recess filter and smokeable article containing a recess filter The invention relates to a recess filter with a cavity associated with the mouth and provided with a cavity wall, in addition to one or more filter elements associated with the tobacco. The cavity wall surrounds either the cavity or the cavity and, at the most, one ... | 07/17/2007 |
| 7240678 | Filtered cigarette incorporating an adsorbent material A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or mo... | 07/10/2007 |
| 7237558 | Filtered cigarette incorporating an adsorbent material A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or mo... | 07/03/2007 |
| 7228861 | Cigarette filter A cigarette filter has filter sections including filter materials individually wrapped with plug wrap paper, forming paper for wrapping the filter sections integrally, and tipping paper covering the forming paper so as to connect the filter sections to a cigarette s... | 06/12/2007 |
| 7074170 | Method and apparatus for making cigarette filters with a centrally located flavored element A filter making apparatus includes a positioning device having a passageway therethrough, with the passageway guiding a continuous flavor element such as a continuous strand of textile material from an inlet of the passageway to an outlet of the passageway. A liquid... | 07/11/2006 |
| 7025067 | Activated charcoal filter for effectively reducing p-benzosemiquinone from the mainstream cigarette smoke A filter for tobacco smoke inhaling/generating/producing device, comprising stipulated amounts of specific grain sizes or combination of grain sizes of activated charcoal for effectively reducing from the mainstream smoke the level of p-benzosemiquinone (p-BSQ), a r... | 04/11/2006 |
| 6779529 | Cigarette filter A cigarette filter includes a multiple section filter which reduces the level of predetermined smoke constituents. The filter includes a fibrous filter plug section, a selective adsorbent section, and a general adsorbent section co-axially aligned in tandem. The sel... | 08/24/2004 |
| 6761174 | Cigarette and filter with downstream flavor addition A cigarette comprises a tobacco rod and a multi-component filter comprising a bed of adsorbent and a flavor-releasing filter segment located downstream of the bed of adsorbent. In the preferred embodiment, the adsorbent is also flavor-bearing and comprises high surf... | 07/13/2004 |
| 6745777 | Tobacco filter means superimposedly rechargeably filled with disposable filter units A tobacco filter device includes a plurality of filter units superimposedly rechargeably filled in a sleeve member, having a bowl member connected to an outer end (smoking end) of the sleeve member and a mouthpiece connected to an inner end (mouth end) of the sleeve... | 06/08/2004 |
| 6718989 | Filter for a cigarette and a filter-tipped cigarette A filter for a cigarette and a filter-tipped cigarette having a high degree of freedom in control of filtering-efficiency of smoke are provided. The filter has a core 10 and a sheath 12 made preferably of tow of cellulose acetate fibers. A plurality of... | 04/13/2004 |
| 6615843 | Tobacco smoke filter and relative composition made of antioxidant and mineral substances A tobacco smoke filter synergist composition is provided comprised of antioxidants and minerals: the former are effective as free radical scavenger and the latter are capable of reducing the other harmful substances from tobacco smoke. In particular, mine... | 09/09/2003 |
| 6584979 | High efficiency cigarette filters having shaped microcavity fibers impregnated with adsorbent or absorbent materials This invention is a highly efficient filter containing fibers that contain small particle size adsorbents/absorbents such as carbon and/or silica to selectively reduce targeted components in mainstream cigarette smoke. The invention relates to a novel cla... | 07/01/2003 |
| 6576034 | Method and apparatus for spinning a web of mixed fibers, and products produced therefrom A fiber spinning device and process for manufacturing a web of fibers including a homogeneous mixture of fibers of different characteristics. Monocomponent fibers of different polymers can be extruded side-by-side from the same die system. Sheath/core bic... | 06/10/2003 |
| 6502582 | Thin cigarettes having filter elements with distinct relative retentions The invention relates to a filter cigarette with a tobacco strand enclosed by a cigarette paper, which has a diameter of 5-7 mm, with a smoke yield of at most 1 mg condensate, with a tobacco-side filter element having a relative retention of >90%, with a ... | 01/07/2003 |
| 6481442 | Smoking article including a filter for selectively removing carbonyls A smoking article including a wrapper surrounding a tobacco column and a selective filter element is disclosed. The selective filter element includes at least one carrier having a developed structure and a plurality of moieties capable of the nucleophilic... | 11/19/2002 |
| 6273095 | Cigarette filter which removes carcinogens and toxic chemicals Disclosed herein is a filter for use with tobacco products, such as cigarettes, cigars and pipes, which selectively absorbs toxic compounds and carcinogenic polynuclear aromatic compounds passing through it, but which permits most low molecular weight spe... | 08/14/2001 |
| 6257242 | Filter element A filter element for reducing or eliminating the harmful vapor phase components of air or smoke. The filter element includes a first section and a second section. The first section is positioned relative to and in fluid communication with the second secti... | 07/10/2001 |
| 6257243 | Smoking articles The invention relates to a coaxial smoking article, particularly a coaxial cigarette, comprising a coaxial rod of smokable material, which rod has an inner segment (1) of smokable material surrounded by a covering (2), around which covering is an outer se... | 07/10/2001 |
| 6206007 | Cigarette with a dual-structure filter A cigarette with a dual-structure filter includes a dual-structure filter having a first filter element and a second filter element arranged downstream of the first filter element, a tobacco rod arranged upstream of the filter, and a tip paper covering a ... | 03/27/2001 |
| 6202650 | Filter-tipped cigarette and filter for a cigarette A filter-tipped cigarette includes a tobacco portion having a tobacco material wrapped by a cigarette paper, and a filter portion which is connected to the tobacco portion. The filter portion has a filter body composed of a plurality of individual filter ... | 03/20/2001 |
| 6067995 | Coaxial cigarette having cross stream barrier The invention relates to a coaxial cigarette including a rod comprising a rod core, a rod core wrapping, a rod jacket and a rod jacket wrapping; and a filter comprising a filter core, a filter core wrapping, a filter jacket and a filter jacket wrapping, a... | 05/30/2000 |
| 5913311 | Cigarette filter and filter material therefor A filter material comprises a cellulose acetate fiber tow containing 5-50% by weight of a water soluble material and/or a water dispersible material which are soluble in a solvent which dissolves cellulose acetate and which are not compatible with cellulo... | 06/22/1999 |
| 5826592 | Control of cigarette smoke chemistry A cigarette smoke filter element is provided which permits a higher level of flavor to reach the smoker during initial smoking of the cigarette and consequently an enhanced flavor-to-tar ratio, by employing an elongate filter of microfine fibers which is ... | 10/27/1998 |
| 5810020 | Process for removing nitrogen-containing anions and tobacco-specific nitrosamines from tobacco products There is disclosed a process for denitrifying tobacco materials and removing barium from tobacco materials, comprising mixing an aqueous-immiscible organic solvent containing a crown ether with an aqueous solution containing soluble components from tobacc... | 09/22/1998 |
| 5787902 | Concentric core filter A ventilated cigarette filter having a tobacco smoke filtering core, a tubular body of air-permeable material around the core, and an outer wrapper engaged around the tubular body and providing in use for the lateral ingress of external air therethrough i... | 08/04/1998 |
| 5718250 | Low gas phase filter for cigarettes A cigarette having an improved carbon-bearing filter. A cigarette is provided with a smokable rod attached to a filter element having a region of carbon-bearing cellulose acetate tow surrounding a substantially impermeable member in the form of a hollow p... | 02/17/1998 |
| 5622190 | Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core A concentric smoking filter in which the peripheral filter medium is a fibrous tow, such as fibrous cellulose acetate tow, and the core filter medium is a web material, such as paper, loaded with carbon particles, is provided. The filter improves the tast... | 04/22/1997 |
| 5568819 | Cigarette filter A cigarette includes a filter element including a carbon-containing paper or a paper containing molecular sieves. The paper contacts the filter material, such as cellulose acetate tow, within the filter element, either by circumscribing the filter materia... | 10/29/1996 |
| 5549125 | Relating to smoking articles A cigarette having a region having means to reduce the vapour phase constituents of tobacco smoke, such as carbon, surrounding a tobacco smoke flow path is provided with ventilation means to channel the tobacco smoke away from the vapour phase constituent... | 08/27/1996 |
| 5524647 | Control of cigarette smoke chemistry A high level of flavour can be provided in cigarette smoke at a low tar level while providing a more uniform delivery of flavour and tar as the cigarette is smoked, in comparison to a conventional cigarette. A tobacco blend is employed using higher-than-n... | 06/11/1996 |
| 5439011 | Coaxial filter cigarette The coaxial filter cigarette according to the invention contains of a coaxial rod portion and a coaxial filter element. The rod portion contains an inner core of a material glowing or smouldering substantially residue-free, in particular tobacco material,... | 08/08/1995 |
| 5435326 | Controlled delivery smoking article and method A smoking article having a controlled yield of wet particulate matter and a method of making a smoking article with predetermined total and per puff yields of wet particulate matter. The smoking article has a tobacco rod connected to an air ventilated com... | 07/25/1995 |
| 5423336 | Ventilated filter cigarette The invention relates to a ventilated filter cigarette having a filter with three chambers, including a middle chamber containing an adsorbent. The strand-side chamber next to the middle chamber achieves a high pressure drop and a low tar retention by mea... | 06/13/1995 |
