Patents by Inventor W. Geoffrey Chan

W. Geoffrey Chan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190116867
    Abstract: A method of smoking a smoking article comprising a filter containing a carbon sorbent and a tobacco rod containing at least one alkanoylated glycoside in a smoking composition comprising tobacco, the method comprising combusting the tobacco and passing tobacco smoke through the filter. Optionally, dry hops extract can also be included in the smoking composition.
    Type: Application
    Filed: December 18, 2018
    Publication date: April 25, 2019
    Applicant: Philip Morris USA Inc.
    Inventors: W. Geoffrey Chan, Christophe Galopin, Andreas Czepa, Mike Nuckols, Beverley Woodson
  • Publication number: 20190053533
    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: Application
    Filed: August 6, 2018
    Publication date: February 21, 2019
    Applicant: Philip Morris USA
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • Patent number: 10051883
    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: October 15, 2013
    Date of Patent: August 21, 2018
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • Patent number: 9034106
    Abstract: A smoking composition for inclusion in a combustible smoking article includes a combustible organic material, such as tobacco and/or tobacco substitutes and at least one alkanoylated glycoside for enhancing the flavor of mainstream smoke. Optionally, dry hops extract can also be included in the smoking composition.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: May 19, 2015
    Assignee: Philip Morris USA Inc.
    Inventors: W. Geoffrey Chan, Christophe Galopin, Andreas Czepa, Mike Nuckols, Beverley Woodson
  • Publication number: 20140041674
    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: Application
    Filed: October 15, 2013
    Publication date: February 13, 2014
    Applicant: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • 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
  • Patent number: 8176923
    Abstract: Provided is a method for reducing TPM cytotoxicity, mutagenicity, and/or phenolic compounds and polycyclic aromatic hydrocarbons in the particulate phase of mainstream smoke. Also provided is a smoking article including tobacco material treated with a bismuth containing compound and optionally glycerin. The method includes forming a suspension of a bismuth containing compound, water, and optionally glycerin. Tobacco material is contacted with the suspension, and then dried to evaporate the water. The tobacco material is used to form smoking articles with potentially reduced TPM cytotoxicity, mutagenicity, and/or targeted constituents in mainstream smoke.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: May 15, 2012
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan
  • Publication number: 20120006340
    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: Application
    Filed: September 22, 2011
    Publication date: January 12, 2012
    Applicant: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • Patent number: 8042552
    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: December 11, 2006
    Date of Patent: October 25, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan, Mohammad Hajaligol
  • Publication number: 20110232655
    Abstract: A smoking composition for inclusion in a combustible smoking article includes a combustible organic material, such as tobacco and/or tobacco substitutes and at least one alkanoylated glycoside for enhancing the flavor of mainstream smoke. Optionally, dry hops extract can also be included in the smoking composition.
    Type: Application
    Filed: March 26, 2010
    Publication date: September 29, 2011
    Applicant: Philip Morris USA Inc.
    Inventors: W. Geoffrey Chan, Christophe Galopin, Andreas Czepa, Mike Nuckols, Beverley Woodson
  • Publication number: 20110083684
    Abstract: Disclosed is a method for removing one or more heavy metals from an aqueous plant extract, comprising: contacting the aqueous plant extract with, and sorbing at least a portion of the one or more heavy metals on, at least one sorbent selected from the group consisting of: one or more surface activated titanium oxide particles, one or more chitosans, one or more calcium phosphates, one or more mercaptoalkyl-substituted silica gels, one or more mercaptoalkyl-substituted mesoporous molecular sieves, one or more finely ground ?-aluminas, one or more photocatalytic titanium dioxide particles, one or more Au-anatases, ceria, and combinations thereof, to form a mixture of sorbent and heavy metal-depleted aqueous plant extract; and separating the sorbent from the mixture to provide a heavy metal-depleted aqueous plant extract.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 14, 2011
    Applicant: Philip Morris USA Inc.
    Inventors: Zhaohua Luan, Donald Miser, Darin Colassaco, W. Geoffrey Chan, Padmanabha Reddy Ettireddy, Sarojini Deevi, Marc Krauss
  • Patent number: 7581543
    Abstract: A tobacco rod having reduced levels of at least one phenolic compound precursor selected from the group consisting of gentisic acid, 3,4-dihydroxybenzoic acid, chlorogenic acid, rutin, scopoletin, quinic acid, a quinic acid derivative, caffeic acid, inositol and lignin. The concentration in mainstream smoke of phenolic compounds such as phenol, hydroquinones (e.g., hydroquinone, methyl hydroquinone and 2,3-dimethyl hydroquinone), catechols (e.g., p-coumaryl quinic acid, feruloyl quinic acid and syringoyl quinic acid) and cresols (e.g., o-cresol, m-cresol and p-cresol) can be reduced by reducing the concentration in uncured (e.g., green) or cured tobacco of the phenolic compound precursors.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: September 1, 2009
    Assignee: Philip Morris USA Inc.
    Inventors: Thomas E. McGrath, Naren K. Meruva, W. Geoffrey Chan, Marc R. Krauss, Darin Colassaco
  • Publication number: 20090000631
    Abstract: Provided is a smoking article and method for reducing TPM cytotoxicity and targeted constituents in mainstream smoke. The smoking article includes tobacco material including a salt of a lanthanide metal. The method includes combining a salt of a lanthanide metal, water, and optionally glycerin to produce a solution that is applied to tobacco material. Preferably, the salt is an acetate, a sulfate, or a gluconate.
    Type: Application
    Filed: May 15, 2008
    Publication date: January 1, 2009
    Applicant: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan
  • Publication number: 20090000632
    Abstract: Provided is a method for reducing TPM cytotoxicity, mutagenicity, and/or phenolic compounds and polycyclic aromatic hydrocarbons in the particulate phase of mainstream smoke. Also provided is a smoking article including tobacco material treated with a bismuth containing compound and optionally glycerin. The method includes forming a suspension of a bismuth containing compound, water, and optionally glycerin. Tobacco material is contacted with the suspension, and then dried to evaporate the water. The tobacco material is used to form smoking articles with potentially reduced TPM cytotoxicity, mutagenicity, and/or targeted constituents in mainstream smoke.
    Type: Application
    Filed: May 30, 2008
    Publication date: January 1, 2009
    Applicant: Philip Morris USA Inc.
    Inventors: Lixin Xue, W. Geoffrey Chan
  • Patent number: 6817365
    Abstract: A cigarette paper includes heat-degradable filler particles to increase the porosity of the cigarette paper during smoking of the cigarette. The porosity of the cigarette paper during smoking of the cigarette will typically be from about 30% to abut 60%. The heat-degradable filler particles are capable of being dissipated at temperatures from about 25° C. to about 350° C. and/or at distances from about 0.1 mm to about 10 mm in advance of a charline formed in the cigarette paper during combustion of the cigarette. Methods of making the cigarette paper, a cigarette using the cigarette paper, and methods for making and smoking such a cigarette are also provided.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: November 16, 2004
    Assignee: Philip Morris USA Inc.
    Inventors: Mohammad Hajaligol, W. Geoffrey Chan
  • Publication number: 20030089377
    Abstract: A cigarette paper includes heat-degradable filler particles to increase the porosity of the cigarette paper during smoking of the cigarette. The porosity of the cigarette paper during smoking of the cigarette will typically be from about 30% to abut 60%. The heat-degradable filler particles are capable of being dissipated at temperatures from about 25° C. to about 350° C. and/or at distances from about 0.1 mm to about 10 mm in advance of a charline formed in the cigarette paper during combustion of the cigarette. Methods of making the cigarette paper, a cigarette using the cigarette paper, and methods for making and smoking such a cigarette are also provided.
    Type: Application
    Filed: November 15, 2001
    Publication date: May 15, 2003
    Inventors: Mohammad Hajaligol, W. Geoffrey Chan
  • Patent number: 5538018
    Abstract: This invention provides a cigarette product which releases vanillin or ethylvanillin aroma in sidestream smoke under cigarette smoking conditions. The paper wrapper of the cigarette product has a content of a flavorant-release additive which is a novel 3-vanillyl-2-hydroxypropyl or 3-ethylvanillyl-2-hydroxypropyl substituted ether derivative of cellulose.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: July 23, 1996
    Assignees: Philip Morris Incorporated, Philip Morris Products Inc.
    Inventors: W. Geoffrey Chan, Yoram Houminer, Ernst K. Just, Makram H. Meshreki, Susan S. Tafur
  • Patent number: 5301693
    Abstract: This invention provides smoking compositions which contain a novel .beta.-hydroxycarboxylate flavorant-release additive. Under cigarette smoking conditions, a combustible filler and/or paper wrapper additive such as calcium bis(2,2-diethyl-3-hydroxy-4-phenylmethylenedecanoate) pyrolyzes and releases .alpha.-hexylcinnamaldehyde as a volatile flavorant component of the cigarette smoke.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: April 12, 1994
    Assignees: Philip Morris Incorporated, Philip Morris Products Inc.
    Inventors: W. Geoffrey Chan, William B. Edwards, III, Harvey J. Grubbs, Yoram Houminer, Charles R. Howe, John D. Naworal, John B. Paine, III, Kenneth F. Podraza, Edward B. Sanders, Jeffrey I. Seeman, Everett W. Southwick
  • Patent number: 5256785
    Abstract: In one embodiment this invention provides smoking compositions which contain a novel oxalate ester flavorant-release additive.Under cigarette smoking conditions, a combustible filler additive such as methyl 2-pyrazinyl-2-propanyl oxalate or di(2-pyrazinyl-2-propanyl) oxalate pyrolyzes and releases 2-isopropenylpyrazine flavorant as a volatile component of the cigarette smoke.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: October 26, 1993
    Assignees: Philip Morris Incorporated, Philip Morris Products Inc.
    Inventor: W. Geoffrey Chan
  • Patent number: 5241105
    Abstract: In one embodiment this invention provides smoking compositions which contain a novel oxalate ester flavorantrelease additive.Under cigarette smoking conditions, a combustible filler additive such as methyl 4-oxo-.beta.-ionyl oxalate pyrolyzes and releases megastigma-5,7,9-trien-4-one as a natural flavorant component of the cigarette smoke.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: August 31, 1993
    Assignees: Philip Morris Incorporated, Philip Morris Products Inc.
    Inventor: W. Geoffrey Chan