By Chemical Reaction, E.g., Ion-exchange, Chelating, Catalytic, Etc. Patents (Class 131/334)
  • Patent number: 10681937
    Abstract: The present disclosure relates to aerosol delivery devices, methods of forming such devices, and elements of such devices. For example, some aerosol delivery devices of the current disclosure include a reservoir having a liquid aerosol precursor composition, an electrical heater in fluid communication with the reservoir and configured to vaporize the liquid aerosol precursor composition to form an aerosol, and a filter operatively arranged relative to the electrical heater such that at least a portion of the formed aerosol passes therethrough, the filter being configured to selectively bind one or more undesirable impurities.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: June 16, 2020
    Assignee: RAI Strategic Holdings, Inc.
    Inventors: Andries Don Sebastian, Michael F. Davis, Sammy Eni Eni, Jannell Rowe, Tracy M. Hefner
  • Patent number: 10624390
    Abstract: The invention provides a method for making a fuel element for a smoking article comprising forming a combustible carbonaceous material into a fuel element adapted for use in a smoking article; incorporating a metal-containing catalyst precursor into the fuel element or onto the surface thereof to form a treated fuel element, the incorporating step occurring before, during, or after said forming step; and optionally heating or irradiating the treated fuel element at a temperature and for a time sufficient to convert the catalyst precursor to a catalytic metal compound. Examples of metal-containing catalyst precursors include iron nitrate, copper nitrate, cerium nitrate, cerium ammonium nitrate, manganese nitrate, magnesium nitrate, and zinc nitrate. Fuel elements treated according to the invention, and smoking articles including such fuel elements, are also provided.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: April 21, 2020
    Assignee: R.J. Reynolds Tobacco Company
    Inventors: Chandra Kumar Banerjee, Stephen Benson Sears
  • Patent number: 10555553
    Abstract: There is provided a smoking article comprising an aerosol generating substrate and a mouthpiece attached to the aerosol generating substrate. The mouthpiece includes a segment comprising a filtration material comprising polylactic acid, and an additive for reducing phenols. The mouthpiece further comprises one or more wrappers circumscribing the segment, the one or more wrappers have a combined basis weight of at least about 50 grams per square metre (gm-2).
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: February 11, 2020
    Assignee: Philip Morris Products S.A.
    Inventors: Enrico Binassi, Yves Jordil
  • Patent number: 10390558
    Abstract: There is provided an aerosol-generating article (10; 100) comprising an aerosol-generating substrate (12) and a mouthpiece (14) secured to the aerosol-generating substrate (12). The mouthpiece (14) comprises at least one filter segment (18, 20) and a substantially transparent tubular segment (22) defining an empty cavity extending substantially longitudinally through the substantially transparent tubular segment (22), wherein aerosol passing through the empty cavity during use of the aerosol-generating article (10; 100) is visible from the exterior of the aerosol-generating article (10; 100) through the substantially transparent tubular segment (22).
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: August 27, 2019
    Assignee: Philip Morris Products S.A.
    Inventor: Ahmet Dincer
  • Patent number: 10362801
    Abstract: The invention relates to a wrapping paper for smoking articles that contains pulp fibers and at least one acid-soluble filler, the content of acid-soluble filler being at least 10 wt % relative to the entire mass of the wrapping paper, and the wrapping paper having portions with a lower transparency and portions with a higher transparency.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: July 30, 2019
    Assignee: delfortgroup AG
    Inventors: Roland Zitturi, Dietmar Volgger
  • Patent number: 10098371
    Abstract: The present invention relates to microalgal food products with acceptable sensory characteristics and methods of producing the food products. The flour can be produced by cultivating microalgal cells of a strain of Chlorella protothecoides under conditions of acceptable pH and dissolved oxygen to produce a desired amount of lipid. The microalgal cells can be lysed, heat-treated, washed and dried to produce a microalgal flour that can be incorporated into a variety of products.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 16, 2018
    Assignee: SOLAZYME ROQUETTE NUTRITIONALS, LLC
    Inventors: Leslie Norris, John Piechocki, Enrique Baliu, Ruchir Desai, Marie Le Ruyet, Samuel Patinier, Damien Passé, Amandine Druon
  • Patent number: 10004256
    Abstract: A smoking article (10, 20) comprises a flavor release segment (12). The flavor release segment (12) comprises a plug of fibrous material circumscribed by a substantially air impermeable wrapper and a plurality of solid menthol particles distributed within the plug of fibrous material. The fibrous material comprises randomly oriented fibers. Preferably the smoking article (10, 20) comprises a mouthpiece (4), wherein the mouthpiece (4) comprises the flavor release segment (12).
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: June 26, 2018
    Assignee: Philip Morris Products S.A.
    Inventors: Dorothy Tritz, Charles Kuersteiner, Yves Jordil, Andrea Cecchetto
  • Patent number: 9937459
    Abstract: In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure, in one aspect, relate to materials that can be used for gas (e.g., CO2) capture, methods of making materials, methods of capturing gas (e.g., CO2), and the like.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: April 10, 2018
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Vivek Polshettiwar, Umesh Patil
  • Patent number: 9820506
    Abstract: A smoking article (10) incorporates a mouthpiece (14), the mouthpiece includes an open pore structure converted from an organic gel and a functional material dispersed in the open pore structure, such as aerogel particles (20).
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 21, 2017
    Assignee: Philip Morris Products S.A.
    Inventors: Firooz Rasouli, Gianluca Sechi
  • Patent number: 9788573
    Abstract: Smoke filters that reduce the concentration of carbon monoxide and phenols in a smoke stream may include a porous mass section comprising a plurality of active particles, a plurality of binder particles, and an active coating disposed on at least a portion of the active particles and the binder particles, wherein the active particles and the binder particles are bound together at a plurality of contact points; and a filter section. In some instances, a filter may include a porous mass section comprising a plurality of active particles and a plurality of binder particles, wherein the active particles and the binder particles are bound together at a plurality of contact points without an adhesive; and a filter section comprising an active dopant.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: October 17, 2017
    Assignee: Celanese Acetate LLC
    Inventors: Lawton E. Kizer, Raymond M. Robertson
  • Patent number: 9723868
    Abstract: A method and a device for producing a mouthpiece cover (2) and/or a filter wrap of a cigarette, a mouthpiece cover material and/or a filter wrap material being provided with at least one inspection hole (4) of a definable shape.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: August 8, 2017
    Assignee: Tannpapier GmbH
    Inventor: Guenter Griesmayr
  • Patent number: 9498504
    Abstract: A process for the preparation of a pharmaceutically effective extract from the cyanobacterium Arthrospira sp. having the following steps: extrusion of a powder containing Arthrospira sp. with the addition of water; extraction of the extrudate with an organic solvent; and provision of the extract as a pharmaceutically effective composition.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: November 22, 2016
    Assignee: Ocean Research & Development GmbH
    Inventors: Jorg Keimes, Patrick Gunther
  • Patent number: 9421515
    Abstract: [Object] To provide a porous carbon material that is able to adsorb desired substances efficiently. [Solving Means] A porous carbon material of the present invention uses peat as a raw material, and has a total of volumes of fine pores having a diameter of from 1×10?8 m to 2×10?7 m, obtained by non-localized density functional theory method, of 0.5 cm3/g or more, or has a volume of fine pores obtained by BHJ method of 0.5 cm3/g or more.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 23, 2016
    Assignee: SONY CORPORATION
    Inventors: Makoto Yoshizaki, Hironori Iida, Takashi Obikawa, Shinichiro Yamada, Seiichiro Tabata, Kazuma Usami, Masakazu Mitsugi, Hirotsugu Ishihara, Shun Yamanoi, Machiko Minatoya
  • Patent number: 9386802
    Abstract: A composite particle comprises a cellulose acetate and at least one amino compound selected from the group consisting of an amino acid and an aminosulfonic acid.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: July 12, 2016
    Assignee: DAICEL CORPORATION
    Inventor: Hiroki Taniguchi
  • Patent number: 9380810
    Abstract: The invention relates to devices and methods for delivering nicotine and/or other alkaloids from tobacco, other plants and other natural sources. More particularly, the invention relates to devices and methods for delivering an aerosol of nicotine to a user's lungs without combustion of the nicotine source materials.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: July 5, 2016
    Assignee: Philip Morris Products S.A.
    Inventors: Seth D. Rose, James Edward Turner, Thangaraju Murugesan, Jed E. Rose
  • Patent number: 9107455
    Abstract: A cigarette filter containing a mesoporous silicate molecular sieve modified by an aminoalkylsilyl group. The modified molecular sieve reacts with selected components of cigarette smoke to remove or reduce the concentration of the components without adversely affecting desirable flavor constituents of the smoke. The modified molecular sieve preferably is SBA-15, MCM-41 or MCM-48 modified by 3-aminopropylsilyl groups. The modified molecular sieve may be incorporated into the filter by inclusion into a space therein or into one or more of the filter elements or into a fibrous component.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: August 18, 2015
    Assignee: Philip Morris USA Inc.
    Inventors: Jay A Fournier, Zhaohua Luan
  • Patent number: 9032970
    Abstract: The invention relates to a special, highly efficient cigarette filter. In particular, the invention relates to a new cigarette filter, in which materials of natural origin not used before in this special field are applied. More particularly, the present invention relates to a special, highly efficient cigarette filter, which can be used favorably for adsorbing the toxic components of the cigarette smoke, and neutralizing the free radicals produced during burning of the cigarette.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: May 19, 2015
    Inventor: Tibor Szarvas
  • Publication number: 20150128963
    Abstract: A smoking article (10) incorporates a mouthpiece (14), the mouthpiece includes an open pore structure converted from an organic gel and a functional material dispersed in the open pore structure, such as aerogel particles (20).
    Type: Application
    Filed: March 15, 2013
    Publication date: May 14, 2015
    Inventors: Firooz Rasouli, Gianluca Sechi
  • Publication number: 20150114412
    Abstract: The invention relates to smoking articles (10) comprising a rod of smokeable material (11) and a filter (12) attached to one end of the rod, said filter comprising at least two sections and being wrapped in a porous plug wrap, wherein a first tipping wrapper (14) overlies the join between the rod of smokeable material and the filter, and at least one additional tipping wrapper (15) is provided around the filter, spaced from and separate to the first tipping wrapper such that a portion of the porous plug wrap is exposed between the first and at least one additional tipping wrapper, and wherein the tipping wrappers are normally less porous than the plug wrap. However if the tipping wrappers are more porous than the plug wraps, the split tipping will still retain its functionality.
    Type: Application
    Filed: April 24, 2013
    Publication date: April 30, 2015
    Applicant: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: David John Dittrich, Mike Bevan, David Rushforth, David Lewis
  • Publication number: 20150107613
    Abstract: The present invention relates to improvements in filters for use in smoking articles such as cigarettes, cigars and cigarillos. The improvements, particularly but not exclusively, relate to filter capabilities and to the manufacture of such filters. In one example, a filter for a smoking article comprises randomly oriented discrete short length fibres of absorbent having adsorbent particles dispersed therein. The invention also provides a filter for a smoking article comprising various other filter arrangements including absorbent and/or adsorbent materials.
    Type: Application
    Filed: May 2, 2013
    Publication date: April 23, 2015
    Applicant: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: David Lewis, Andrew Davis, John Richardson, John Major, John Sampson
  • Publication number: 20150090283
    Abstract: Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Inventors: Wei-Jun Zhang, Mark Zhuang, Shahryar Rabiei, Firooz Rasouli
  • Patent number: 8960197
    Abstract: A filter (11) for a smoking article (10) comprises a first flowpath (13) through the filter, a second flowpath (14) through the filter, the second flowpath being disposed around the first flowpath, and a selector (16) for allowing flow selectively through the first and second flowpaths.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: February 24, 2015
    Assignee: British American Tobacco (Investments) Limited
    Inventors: Mark Bailey, Karl Kaljura, Paul Farenden, David Russell, Wilbert Schoenmakers, Darren Seymour, David Spendlove
  • Patent number: 8950409
    Abstract: A tobacco smoking mixture and/or a cigarette wrapper with high-temperature ammonia-release agents therein are provided, wherein the high-temperature ammonia-release agents are present in an amount effective to reduce the cytotoxicity of gas phase or particulate matter formed during smoking of the cigarette. The high-temperature ammonia-release agents are capable of reducing the cytotoxicity of gas phase or particulate matter by evolving ammonia at temperatures greater than about 200° C., wherein the ammonia can interact with the particulate matter. Additionally, the high-temperature ammonia-release agents can be formed by heating an aqueous mixture of an iron precursor compound, an ammonia source compound and an acid.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: February 10, 2015
    Assignee: Philip Morris USA Inc.
    Inventors: Jay A Fournier, John B. Paine, Douglas A. Fernandez
  • Publication number: 20140311507
    Abstract: Described herein are compositions and methods for capturing carbonylic or phenolic toxicants, or converting these toxicants into less volatile compounds. The toxicants, which may be a component of cigarette smoke, may be captured by physical or chemical adsorption, absorption, or entrapment.
    Type: Application
    Filed: August 1, 2012
    Publication date: October 23, 2014
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Lev E. Bromberg, Trevor A. Hatton
  • Patent number: 8864909
    Abstract: Electrically heated cigarettes used in an electrical smoking system include a flavoring-release additive and sorbent effective to remove one or more gas-phase constituents of mainstream tobacco smoke. The flavoring-release additive includes gamma cyclodextrin and at least one flavoring. Flavoring is released in a cigarette upon the flavoring-release additive reaching at least a minimum temperature during smoking. The flavoring-release additive can have various forms including, for example, powder and films.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: October 21, 2014
    Assignee: Philip Morris USA Inc.
    Inventors: Munmaya K. Mishra, Susan E. Wrenn, Jay A Fournier
  • Patent number: 8807144
    Abstract: Smoking articles having reduced ignition proclivity characteristics are disclosed. The smoking articles include a wrapper comprising cellulosic fibers and a filler. In accordance with the present disclosure, the filler has a particle size of at least about 3.2 microns and is present in the wrapper in an amount less than about 20% by weight. Further, the wrapper may have a basis weight of less than about 23 gsm and a permeability of from about 15 Coresta to about 110 Coresta. It has been discovered that such wrappers are capable of reducing the ignition proclivity characteristics of a smoking article. If desired, the particular wrapper as described above can also contain discrete areas treated with an ignition reducing composition which further serves to reduce the ignition proclivity characteristics of the article.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: August 19, 2014
    Assignee: Schweitzer-Mauduit International, Inc.
    Inventors: Vladimir Hampl, Jr., Alice Gu, James Rossi-Espagnet
  • Patent number: 8807142
    Abstract: A class of molecularly imprinted polymers that specifically recognizes and binds to nitrosamines members of which class are useful, for example, in analysis and separation of nitrosamines from biological fluids. Such molecularly imprinted polymers are also useful in methods of treating and manufacturing tobacco products and materials.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: August 19, 2014
    Assignee: British American Tobacco (Investments) Limited
    Inventors: Sumita Bhattacharyya, Kevin McAdam, Anthony Rees, Börje Sellergren, Christine Widstrand
  • Patent number: 8739802
    Abstract: A filtered cigarette possesses a smokable rod and a filter element. The filter element possesses a segment incorporating filter material (e.g., cellulose acetate tow) having carbonaceous material (e.g., activated charcoal particles) or other adsorbent dispersed throughout the filter material, and encapsulated flavoring agent (e.g., flavor-containing microcapsules) dispersed throughout the filter material.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: June 3, 2014
    Assignee: R.J. Reynolds Tobacco Company
    Inventor: Barry Smith Fagg
  • Patent number: 8720450
    Abstract: A filter element for use in a smoking article and providing filtration of particulate material and gaseous components of mainstream smoke is provided. The filter element includes a segment of fibrous tow comprising a plurality of individual filaments, wherein each individual filament includes a plurality of adsorbent material particles at least partially encapsulated with a removable encapsulant imbedded therein. The individual filaments may further include an outer coating that provides a plurality of reactive groups adapted for reaction with one or more components of mainstream smoke. Alternatively, the multifunctional filter element combines different fibrous filter materials, such as cellulose acetate or polyolefin filaments combined with activated carbon filaments and at least one of ion exchange filaments and catalytic filaments.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: May 13, 2014
    Assignee: R.J. Reynolds Tobacco Company
    Inventor: Andries Don Sebastian
  • Publication number: 20140109922
    Abstract: Cut filler compositions, cigarettes, methods for making cut filler compositions and cigarettes, and methods for treating mainstream tobacco smoke of cigarettes are provided that use catalyst particles capable of converting carbon monoxide to carbon dioxide. The catalyst particles are supported on tobacco powder. The tobacco powder supported catalyst particles can be prepared by dry admixing the catalyst particles and tobacco powder or by combining a dispersion of catalyst particles with the tobacco powder.
    Type: Application
    Filed: December 20, 2013
    Publication date: April 24, 2014
    Applicant: Philip Morris USA Inc.
    Inventors: Shalva Gedevanishvili, Ping Li, Firooz Rasouli, Mohammad Hajaligol
  • Patent number: 8703083
    Abstract: Immobilized nitronyl nitroxide active sites on the surface of a porous inorganic oxide support act as efficient and rapid oxidants for NO, reacting with >99% of the NO under flow conditions through a packed bed; and, in a parallel configuration with nitroxyl radical active sites, act to remove >99 % of both NO and NO2 from a gas mixture, with >95% of the active sites participating in NOx trapping.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: April 22, 2014
    Assignees: The Regents of the University of California, Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Andrew Solovyov, Alexander Katz, Enrique Iglesia, Paul Timothy Fanson
  • Patent number: 8678016
    Abstract: A low sidestream smoke cigarette comprises a conventional tobacco rod, and a combustible treatment paper having a sidestream smoke treatment composition. The treatment composition comprises in combination, an oxygen storage and donor metal oxide oxidation catalyst and an essentially non-combustible finely divided porous particulate adjunct for said catalyst.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: March 25, 2014
    Assignee: Rothmans, Benson & Hedges, Inc.
    Inventors: Stanislav M. Snaidr, E. Robert Becker
  • Publication number: 20130340777
    Abstract: Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.
    Type: Application
    Filed: August 27, 2013
    Publication date: December 26, 2013
    Applicant: Philip Morris USA Inc.
    Inventors: Wei-Jun Zhang, Mark Zhuang, Shahryar Rabiei, Firooz Rasouli
  • Patent number: 8607802
    Abstract: A method for forming a polycomponent fiber comprising a first, fiber-forming component comprising a polymer, and a second, component comprising an active ingredient that will selectively reduce or remove components of tobacco smoke, the method comprising the steps of: i. forming a dispersion, second solution or liquid comprising the second component; and ii. coextruding the first component and the dispersion, second solution or liquid through a jet or aperture to form a fiber comprising a first portion formed from the first component, and a second portion formed from the second component.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: December 17, 2013
    Assignee: Celanese Acetate Limited
    Inventors: Andrew John Banks, Craig Day, John Travers
  • Patent number: 8602036
    Abstract: A large variety of electrospun fibers can be produced to encapsulate a large variety of additives within the subcompartments or substructures of the manufactured electrospun fiber. Furthermore, the manufactured electrospun fibers can be electrostatically arranged within a filter component of a smoking article during the manufacturing process. By modifying the various parameters that control the electrospinning process, a diverse set of electrospun fibers can be manufactured that vary in composition, in substructural organization, and in dimension. The electrospun fiber produced by electrospinning comprises at least one type of polymeric material that encapsulates or supports the retention of at least one type of a flavorant or a non-flavorant within the electrospun fiber. A polymeric material provides a supporting structure for encapsulating at least one type of a flavorant or a non-flavorant.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: December 10, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Manuel Marquez, Samuel Isaac Ogle, Zhihao Shen
  • Patent number: 8580081
    Abstract: The invention concerns a paper for smoking article, in particular for a cigarette, comprising areas treated with a coating formulation adapted to reduce the ignition propensity of said treated areas which comprises nanoparticles of cellulose having a median dimension (d50) equal to or less than five micrometers.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: November 12, 2013
    Assignee: Papeteries du Leman
    Inventors: Jocelyne Dumas, Joel Malachie, Arnaud Ruffin, Julie Jeanrot
  • Patent number: 8578943
    Abstract: Cut filler compositions, smoking articles such as cigarettes, methods for making cigarettes and methods for treating cigarette smoke are provided, which involve the use of metal-containing nanowires. The metal-containing nanowires are capable of removing at least one constituent from tobacco smoke, preferably in a selective manner. The metal-containing nanowires may comprise any suitable metal, metal oxide or mixtures thereof. For example, the metal-containing nanowires comprise at least one transition or lanthanide metal or metal oxide thereof. Exemplary metals or metal oxides thereof include, but are not limited to, iron, copper, zinc, titanium, vanadium, palladium, cobalt, molybdenum and manganese.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: November 12, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Zhaohua Luan, Jay A Fournier
  • Patent number: 8567412
    Abstract: This invention provides for reducing free-radicals from cigarette smoke by using a filter impregnated by an extract of a rosemary plant in oil, containing carnosol, rosmanol, rosmadial, carnosic acid, genkwanin and rosmarinic acid. The extract is obtained by extraction with an alcoholic solvent or an aqueous alcoholic solvent, followed by extraction with a supercritical fluid.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: October 29, 2013
    Assignee: Biosyntec
    Inventor: Imam Emami
  • Patent number: 8555897
    Abstract: A tobacco smoking mixture including an ammonia-release compound adapted to be formed into a lit-end cigarette is provided. The ammonia-release compound is incorporated in or on tobacco cut filler in an amount effective to reduce the cytotoxicity, and/or selective smoke constituents of cigarette smoke. Exemplary ammonia-release compounds include ammonium acetate, ammonium hydroxide, hexammine cobalt (III) chloride, hexammine cobalt (III) acetate, and combinations thereof. The ammonia-release compounds can release ammonia at temperatures between about 60° C. and about 400° C. Ammonia-release compounds can be combined with additives, such as glycerine, cobalt acetate, copper (II) acetate, zinc acetate, other metal salts or combinations thereof, to further reduce the cytotoxicity of cigarette smoke.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 15, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • Publication number: 20130239983
    Abstract: Disclosed are filters, smoking devices, related articles and apparatus, and related methods. The filters include porous masses that have an active particle and a binder particle, wherein the active particle comprises carbon and the porous mass has a carbon loading of at least about 6 mg/mm and an encapsulated pressure drop of about 20 mm of water or less per mm of porous mass.
    Type: Application
    Filed: April 5, 2013
    Publication date: September 19, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Peter Burke, Meinhard Gusik, Julia Hufen, Luis Jiminez, Raymond Robertson, Ramesh Srinivasan
  • Patent number: 8528567
    Abstract: A smoking article having a heat source at a first end of the smoking article and a catalyst adjacent to the heat source. The catalyst is capable of catalyzing carbon monoxide from the heat source to carbon dioxide and water. A filter segment is located at a second end of the smoking article opposite the first end with an aerosol generating segment disposed between the catalyst and the filter segment.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: September 10, 2013
    Assignee: Philip Morris USA Inc.
    Inventor: Mohammad R. Hajaligol
  • Patent number: 8511319
    Abstract: The invention provides a modified adsorbent material impregnated with a metal oxide, which can be used in a filter element adapted for use in a smoking article. The modified adsorbent material exhibits increased filtration efficiency with respect to certain gas phase species of mainstream cigarette smoke. Exemplary adsorbent materials that can be modified according to the invention include activated carbon, molecular sieves, clays, ion exchange resins, activated aluminas, silica gels, meerschaum, and mixtures thereof. One example of a metal oxide is cerium oxide. Impregnation with a metal oxide can be accomplished by directly treating the adsorbent with a metal oxide or impregnating the adsorbent with a metal oxide precursor, such as cerium nitrate, followed by calcining the impregnated material to convert the precursor to the desired metal oxide. Methods of forming the modified adsorbent material and smoking article filters incorporating the modified adsorbent material are also provided.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: August 20, 2013
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Stephen Benson Sears, Chandra Kumar Banerjee
  • Patent number: 8496012
    Abstract: A method of making composite nanoscale particles comprising subjecting a starting material to laser energy so as to form a vapor and condensing the vapor so as to form the composite nanoscale particles, wherein said composite nanoscale particles comprise a first metal and/or a first metal oxide incorporated in nanoscale particles of an oxide of a second metal, the first metal being different than the second metal. The starting material can comprise first and second metals or compounds of the first and second metals. The composite nanoscale particles can be formed in a reaction chamber wherein a temperature gradient is provided. The atmosphere in the chamber can be an inert atmosphere comprising argon or a reactive atmosphere comprising oxygen. The composite nanoscale particles are useful for low-temperature and near-ambient temperature catalysis.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: July 30, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Sarojini Deevi, Rangaraj S. Sundar, Yezdi B. Pithawalla
  • Patent number: 8469035
    Abstract: The invention provides a method for making a fuel element for a smoking article comprising forming a combustible carbonaceous material into a fuel element adapted for use in a smoking article; incorporating a metal-containing catalyst precursor into the fuel element or onto the surface thereof to form a treated fuel element, the incorporating step occurring before, during, or after said forming step; and optionally heating or irradiating the treated fuel element at a temperature and for a time sufficient to convert the catalyst precursor to a catalytic metal compound. Examples of metal-containing catalyst precursors include iron nitrate, copper nitrate, cerium nitrate, cerium ammonium nitrate, manganese nitrate, magnesium nitrate, and zinc nitrate. Fuel elements treated according to the invention, and smoking articles including such fuel elements, are also provided.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: June 25, 2013
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Chandra Kumar Banerjee, Stephen Benson Sears
  • Patent number: 8443812
    Abstract: The present invention is directed to smoking articles having reduced carbon monoxide delivery are described. A carbon monoxide reducing agent is incorporated into the smoking article in order to reduce carbon monoxide levels in mainstream smoke. The carbon monoxide reducing agent may be, for instance, in metal oxide or in metal carbonate. The carbon monoxide reducing agent may be incorporated into a wrapper and/or into a column of smokable filler that are used to construct the smoking article.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: May 21, 2013
    Assignee: Schweitzer-Mauduit International, Inc.
    Inventors: Vladimir Hampl, Jr., Alice Gu, Kerry Mahone
  • Publication number: 20130112214
    Abstract: A method for forming a filter rod may include providing a bale of crimped tow band having about 10 denier per filament or greater and about 20,000 total denier or less, the crimped tow band comprising a plurality of cellulose acetate filaments; and placing the crimped tow band in an apparatus so as to form a filter rod.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 9, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Christopher M. Bundren, William S. Sanderson, Paul Busby, Edward J. Clark
  • Publication number: 20130074853
    Abstract: A system configured to produce smokable products including filter elements formed from multiple fibers is provided. The system includes a texturing apparatus configured to combine the fibers such that the fibers are at least partially entangled with each other and form a mixed fiber product. The entangled fibers may be sufficiently separated from one another such that plasticizer may be applied to the mixed fiber product without necessarily performing tow opening, crimp removal, or blooming operations. The fibers combined to form the mixed fiber product may define characteristics that differ or which are the same. Accordingly, filter elements may be produced that include different fibers that have respective desirable properties associated therewith. Related methods, apparatuses and mixed fiber products are also provided by the disclosure.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 28, 2013
    Inventors: Andries D. Sebastian, Huamin Gan, Kenneth C. Deloach, Richard L. Sizemore, Dean M. Vick
  • Patent number: 8402977
    Abstract: A tobacco smoke filter which gives an acceptable vapor phase filtration and flavor delivery in the presence of a volatile flavorant (e.g. menthol), the filter containing activated carbon in which (1) pores of under 2 nm pore diameter (micropores) provide a pore volume of at most 0.3 cm3/g (NZ); and (2) (a) pores of 2 to 50 nm pore diameter (mesopores) provide a pore volume of at least 0.25 cm3/g (N2) and/or (b) pores of 7 to 50 nm diameter (larger mesopores) provide a pore volume of at least 0.12 cm3/g (Hg).
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: March 26, 2013
    Assignee: Filtrona International Limited
    Inventor: Anthony Denis McCormack
  • Patent number: 8397733
    Abstract: A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow and a plug wrap surrounding the filter element, and a pill dispersed in the tow. The pill includes a material adapted to catalyze hydrolysis of the cellulose acetate tow that is encapsulated with an inner layer of a water soluble or water permeable material and an outer layer of a cellulose acetate having a D.S. in the range of 2.0-2.6.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: March 19, 2013
    Assignee: Celanese Acetate LLC
    Inventor: Raymond M. Robertson
  • Patent number: 8375959
    Abstract: The invention relates to a smoking article incorporating a smoking material comprising three main components, namely a non-combustible inorganic filler, an alginic binder and aerosol generating means. The smoking material is combined with tobacco material, which may be treated with additional humectant, to provide a smoking article that has an aerosol transfer efficiency ratio of greater than 4.0.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: February 19, 2013
    Assignee: British American Tobacco (Investments) Limited
    Inventors: David John Dittrich, Joseph Peter Sutton, Steven Coburn, James N Figlar