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| Number | Title | Issue Date |
| 7878210 | Cellulose acetate fiber modification Cellulose acetate fibers can be modified to have physical imperfections and then incorporated into cigarette filter plugs as filtering materials. Cellulose acetate fiber modification can be achieved by etching with a gas phase etchant or a liquid phase etchant compr... | 02/01/2011 |
| 7302954 | Cigarette filter comprising grape proanthocyanidin To a constitutive element of a tobacco (a leaf-tobacco component or a filter) is added a proanthocyanidin or a proanthocyanidin-carrying porous material (such as an active carbon) to obtain an element for tobacco smoke. The proanthocyanidin may be at least one extra... | 12/04/2007 |
| 6779528 | High surface area micro-porous fibers from polymer solutions Fibers are produced from an acetone solution of cellulose acetate by pulling or extruding such material through a spinneret in a dry spinning process. A vacuum is applied to the thus formed fibers after a certain degree of drying. A dried outer skin is formed, and t... | 08/24/2004 |
| 6776168 | Disintegratable cigarette filter The invention relates to a high performance cigarette filter on the basis of cellulose ester fibers or filaments which can be mechanically disintegrated. The inventive high-performance cigarette filter is characterized in that a) the fiber weight (or filament weight... | 08/17/2004 |
| 6739344 | Biodegradable cellulose acetate structure and tobacco filter A cellulose acetate structure excellent in its biodegradability. At least a surface region of the structure includes a biodegradable cellulose acetate composition containing a biodegradation promoting agent contained in cellulose acetate. The agent includes at least... | 05/25/2004 |
| 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 |
| 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 |
| 6530377 | Cigarette filter containing dry water and a porphyrin A tobacco smoke filter comprising a porous substrate comprising dry water and a porphyrin dispersed therein. The porous substrate can further comprise microcapsules. The microcapsules can comprise one or more substances selected from the group consisting ... | 03/11/2003 |
| 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 |
| 6344239 | Method for producing a tobacco filter material A method for producing a tobacco filter material which is either (A) a coating process for coating the surface of a fibrous or particulate cellulose with a cellulose ester having an average substitution degree of about 2.0 to about 2.6 to give a coated ce... | 02/05/2002 |
| 6311696 | Smoking articles The invention relates to low delivery cigarettes, usually having a mainstream particulate matter delivery of about 9 mg or less. An embodiment has a rod of tobacco material and a filter element. The filter element is an alkali filter material section havi... | 11/06/2001 |
| 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 |
| 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 |
| 6164288 | Cigarette filter containing dry water and microcapsules A tobacco smoke filter containing a porous substrate having dry water and microcapsules dispersed therein. The microcapsules contain at least one compound selected from the group consisting of chlorophyllin, methylcellulose, sodium pyroglutamate and a veg... | 12/26/2000 |
| 6145511 | Filter cigarette A description is given of a filter cigarette, whose filter a) contains fibrous filter material, b) contains an additive with an antimutagenic action on the cigarette smoke in a quantity of less than 15 wt. %, based on the fiber weight of the filter and c) on s... | 11/14/2000 |
| 6062228 | Biodegradable filter material and method for its manufacture There is provided a biodegradable filter tow or filter material from renewable raw materials for the use as a tobacco smoke filter element of cigarettes, cigars or pipes as well as a method for preparing it, wherein fibers, films or foams prepared in an e... | 05/16/2000 |
| 5979460 | Method of producing tobacco filters A tobacco filter with a circumferential length of 17 to 27 mm is prepared by creping or embossing, with a roller of a temperature not lower than 100° C., a sheet-like material comprising not less than 20% by weight of a cellulose ester component and havi... | 11/09/1999 |
| 5970988 | Environmentally non-persistant cellulose ester fibers This invention provides cellulose ester fibers having an intermediate degree of substitution per anhydroglucose unit (DS/AGU) along with pigments which act as photooxidation catalysts. The fibers are useful as filter materials for tobacco products. The fi... | 10/26/1999 |
| 5967149 | Tobacco filter material and a method of producing the same Using a slurry containing a particulate or fibrous cellulose ester and a wood pulp with a Canadian standard freeness of 100 to 800 ml in a ratio of 10/90 to 90/10 (weight %), a tobacco filter material in the form of a sheet having a nonwoven web structure... | 10/19/1999 |
| 5947126 | Environmentally disintegratable tobacco smoke filter rod A bundle of cellulose acetate fibers is bonded together with a water-soluble fiber-to-fiber bonding agent. The water-soluble fiber-to-fiber bonding agent may include 60-99 wt. % of a water-soluble binder and 40-1 wt. % of a plasticizer. As to the specific... | 09/07/1999 |
| 5947127 | Tobacco filters and method of producing the same A filter rod is produced by adding a water-soluble polymer in the form of an aqueous solution or dispersion, or in a particulate form, to a tow of cellulose ester fiber, with the amount of any water used being controlled within 25 parts by weight relative... | 09/07/1999 |
| 5927287 | Tobacco filter material and a tobacco filter as produced using the same A tobacco filter is produced by wrapping up a sheet-like filter material having a web structure and comprising a cellulose ester short staple into a rodform. As the cellulose ester short staple, a short staple that is non-crimped and/or has a modified cro... | 07/27/1999 |
| 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 |
| 5860428 | Cigarette filter containing a humectant A cigarette filter comprises a humectant, preferably sodium pyroglutamate, and optionally a surfactant. The humectant absorbs moisture from the tobacco smoke for wet-filtration of the tobacco smoke.... | 01/19/1999 |
| 5856006 | Tobacco filter material and a method for producing the same A tobacco filter material containing fibers which have a core and a surface layer which surrounds the core, wherein the core comprises a non-esterified cellulose and the surface layer comprises a cellulose ester. The fiber may be (A) a cellulose fiber coa... | 01/05/1999 |
| 5823201 | Tobacco filters and a method of producing the same A tobacco filter with a circumferential length of 17 to 27 mm is prepared by creping or embossing, with a roller of a temperature not lower than 100° C., a sheet-like material comprising not less than 20% by weight of a cellulose ester component and havi... | 10/20/1998 |
| 5738119 | Filter materials Cigarette filters which comprise hydroentangled lyocell staple fibers are disclosed. High filter efficiencies, good taste properties, good resistance to staining, good physical resilience and good air flow characteristics are observed when cigarettes cont... | 04/14/1998 |
| 5728462 | Cigarette filter material A cigarette filter material is provided which is free from the occurrence of acetic acid odor, even after long-term storage in a hermetically sealed condition, which ensures excellent palatability. This cigarette filter material comprises a fiber assembly... | 03/17/1998 |
| 5727573 | Smoker's article The smoker's article comprises a filter, a tobacco rod and a wrapper. The tobacco rod contains a catalyst consisting of a hydrated zeolite or a zeolite-like molecular sieve, the said zeolite or zeolite-like material being defined by the following formula:... | 03/17/1998 |
| 5706833 | Tobacco filters and method of producing the same A filter rod is produced by adding a water-soluble polymer in the form of an aqueous solution or dispersion, or in a particulate form, to a tow of cellulose ester fiber, with the amount of any water used being controlled within 25 parts by weight relative... | 01/13/1998 |
| 5692527 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes A tobacco smoke filter material has a fibrillated cellulose ester fiber with an average fiber diameter of 15 to 250 μm and a BET specific surface area of 0.5 to 4.5 m2 /g. The fibrous cellulose ester content of the material may for example be ... | 12/02/1997 |
| 5690126 | Tobacco filter materials and tobacco filter as produced by using the same A tobacco filter is obtained by shaping a sheet material having a web structure and comprising (1) cellulose acetate or other cellulose ester short staple, and (2) a binder fiber selected from polysaccharides or their derivatives and biodegradable polymer... | 11/25/1997 |
| 5647383 | Photodegradable cellulose ester tow The present invention is directed to a man-made fiber comprising a cellulose ester and 0.05 to 5.0% by weight of a titanium dioxide having an average particle size of less than 100 nanometers.... | 07/15/1997 |
| 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 |
| 5618620 | Filter rod for filtering the smoke of a cigarette A filter rod for filtering the smoke of a cigarette including an acetate tow having a high crimp modulus and the acetate tow is bloomed and wrapped by a paper to form the filter rod, wherein a degree of crimping of the acetate tow at a position just downs... | 04/08/1997 |
| 5575302 | Filter for removing nitrogen oxides from tobacco smoke A filter for removing nitrogen oxides (NOx) from tobacco smoke comprises A) a poly(arylene thioether), B) if appropriate a conventional filter material and C) if appropriate at least one surface-active solid. By means of use of this filter, in ... | 11/19/1996 |
| 5509430 | Bicomponent fibers and tobacco smoke filters formed therefrom Sheath-core bicomponent fibers comprising a core of a low-cost, high strength, thermoplastic material, preferably polypropylene, completely covered with a sheath formed preferably of plasticized cellulose acetate, ethylene-vinyl acetate copolymer, polyvin... | 04/23/1996 |
| 5507304 | Polymer blend composed of cellulose acetate and starch acetate used to form fibers, films and plastic materials and a process to prepare said blend A blend of cellulose acetate and starch acetate used to make fibers, filaments, yarns, fabrics, plastic materials and other uses is disclosed. Additionally, the invention relates to the process of making said blend; cigarette filters made from tow compose... | 04/16/1996 |
| 5495860 | Structures formed from cellulose acetate, use thereof for the manufacture of filter tow, use of the filter tow for the manufacture of a tobacco smoke filter element, as well as a filter tow and a tobacco filter element Structures are formed from cellulose acetate in which an additive is present or on this surface the additive consisting of a nitrogenous organic compound which by degradation by microorganisms forms basic decomposition products, in particular ammonia, and... | 03/05/1996 |
| 5462801 | Filter Tow, method for the production thereof, as well as tobacco smoke filter element and method for its production A filter tow from cellulose acetate filaments and/or staple fibers is described on the surface of which an additive from cellulose chain-splitting enzymes is present, at least the surface of the filaments and staple fibers consisting of a cellulose acetat... | 10/31/1995 |
