Patents by Inventor Zheng Tan

Zheng Tan 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).

  • Patent number: 8007635
    Abstract: A process comprising treating a lignocellulosic material preferably pulp in the presence of a transition metal catalyst with a oxidizing agent selected from a group consisting of hydrogen peroxide, hypochlorite, hypochlorous acid and any combination thereof to form a treated lignocellulosic material having a viscosity equal to or less than about 17 cp and having reducing functional groups selected from the group consisting of aldehyde and aldehyde type functional groups at the C6 and C1 positions but predominating at the C1 position.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: August 30, 2011
    Assignee: International Paper Company
    Inventors: Zheng Tan, Damaris Lorenzoni, Gopal Goyal
  • Publication number: 20110151097
    Abstract: A method of making a water-dispersible composition comprises coprocessing a microcrystalline cellulose wetcake and at least one starch by co-attrition to form an admixture comprising colloidal microcrystalline cellulose and said at least one starch. The admixture is subsequently dried. Optionally, the admixture may be combined with an additional hydrocolloid, such as a galactomannan, before or after drying. A dried colloidal microcrystalline cellulose composition may then be dispersed in an aqueous media to form the food/beverage product. In particular, the composition may be dispersed in an aqueous media containing, for example, a protein to form a low pH beverage composition.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 23, 2011
    Applicant: FMC CORPORATION
    Inventors: Domingo Tuason, Michael Cammarata, Gregory Krawczyk, Zheng Tan
  • Publication number: 20090317549
    Abstract: A composition is provided, which comprises a water-soluble salt of a divalent metal; a complexing agent having an affinity for the divalent metal; and an optical brightening agent. Methods of using the composition, and recording sheets which include the composition, are also disclosed.
    Type: Application
    Filed: May 12, 2009
    Publication date: December 24, 2009
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: ZHENG TAN, SEN YANG, JINGXIU WAN, BENNY J. SKAGGS, BENJAMIN T. LIGUZINSKI
  • Publication number: 20090274920
    Abstract: The present invention provides a biodegradable polymer composition useful for manufacturing biodegradable in which, the process comprising: (1) providing a renewable polymer and/or natural fiber having: (a) a Ts value of up to about 90° C.; and (b) a heat distortion index of up to about 90° C.; (2) providing a heat-resistant polymer having: (a) a Ts of greater than about 60° C.; and (b) a heat distortion index greater than about 50° C., wherein the Ts value and heat distortion index of the heat-resistant polymer is greater than that of the renewable polymer and/or natural fiber; and (3) coextruding the heat-resistant polymer and the renewable polymer to provide a thermoformable composite comprising a core comprising the renewable polymer and/or natural fiber, wherein the renewable polymer and/or natural fiber comprises at least about 50% by weight of the composite and a heat-resistant outer layer comprising the heat-resistant polymer which substantially surrounds the core.
    Type: Application
    Filed: May 4, 2009
    Publication date: November 5, 2009
    Applicant: International Paper Company
    Inventors: Wei Li, Zheng Tan, Thomas Robert Christie, Bruce J. Thoman, Richard A. Tedford, Mark Fagan
  • Publication number: 20090165968
    Abstract: A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from about 5 to about 10% by dry weight of the modified pulp.
    Type: Application
    Filed: March 5, 2009
    Publication date: July 2, 2009
    Applicant: International Paper Company
    Inventors: ZHENG TAN, GOPAL GOYAL, ALEXANDER A. KOUKOULAS
  • Publication number: 20090156532
    Abstract: Analysis of microRNA interference with HLA-G expression identified the HLA-G 3?UTR SNP+3142G/C that disrupts a target for microRNA 148 (miR148) and is associated with asthma. The polymorphism is associated with protection from (or susceptibility to) moderate to severe viral infection in the first 3 years of life and asthma by age 6, with an interaction with mother's affection status (asthma). A SNP in the 3?-Untranslated Region (UTR) of HLA-G influences the targeting of 3 micro(mi)RNAs to the gene. Allele-specific targeting of these miRNAs accounts, at least in part, for the association between HLA-G and the risk of asthma.
    Type: Application
    Filed: January 23, 2007
    Publication date: June 18, 2009
    Applicant: THE UNIVERSITY OF CHICAGO
    Inventors: Carole Ober, Zheng Tan, Jihua Fan
  • Patent number: 7520958
    Abstract: A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from about 5 to about 10% by dry weight of the modified pulp.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: April 21, 2009
    Assignee: International Paper Company
    Inventors: Zheng Tan, Gopal Goyal, Alexander A. Koukoulas
  • Patent number: 7497924
    Abstract: The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of paper or paper board. Additionally, the texturized microcrystalline cellulose may be used as a starting material for production of paper or paper board.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: March 3, 2009
    Assignee: International Paper Company
    Inventors: Xuan Truong Nguyen, Zheng Tan
  • Publication number: 20090054863
    Abstract: A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about I and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp.
    Type: Application
    Filed: May 16, 2008
    Publication date: February 26, 2009
    Inventors: Zheng Tan, Xuan Nguyen, Karen L. Maurer
  • Publication number: 20080294132
    Abstract: The present invention relates to compositions containing stabilized and/or activated urease inhibitors, as well as methods of making and using the same.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 27, 2008
    Inventors: Zheng Tan, Gopal C. Goyal, Linnea J. Shaver
  • Publication number: 20080271866
    Abstract: The invention relates to the papermaking art and, in particular, to the manufacture of paper or paperboard substrates, paper-containing articles such as multilayered paper or paperboard or corrugated-based packaging, having a functional layer, as well as methods of making and using the same.
    Type: Application
    Filed: January 8, 2008
    Publication date: November 6, 2008
    Inventors: Yaoliang Hong, Sen Yang, Jay C. Song, Richard F. Rudolph, Derek L. Miller, Yan C. Huang, Benjamin Thomas Liguzinski, Ewa Gertruda Bucher, Zheng Tan, Sandeep Kulkarni, Keith S. Shih
  • Publication number: 20070119556
    Abstract: A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp.
    Type: Application
    Filed: January 24, 2007
    Publication date: May 31, 2007
    Inventors: Zheng Tan, Xuan Nguyen, Karen Maurer
  • Publication number: 20070051481
    Abstract: A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from about 5 to about 10% by dry weight of the modified pulp.
    Type: Application
    Filed: October 18, 2006
    Publication date: March 8, 2007
    Inventors: Zheng Tan, Gopal Goyal, Alexander Koukoulas
  • Publication number: 20070000627
    Abstract: A method of producing a modified pulp for use in paper or paper web products, the method comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from about 5 to about 10% by dry weight of the modified pulp.
    Type: Application
    Filed: May 24, 2006
    Publication date: January 4, 2007
    Inventors: Zheng Tan, Gopal Goyal, Alexander Koukoulas
  • Publication number: 20060260773
    Abstract: A process comprising treating a lignocellulosic material preferably pulp in the presence of a transition metal catalyst with a oxidizing agent selected from a group consisting of hydrogen peroxide, hypochlorite, hypochlorous acid and any combination thereof to form a treated lignocellulosic material having a viscosity equal to or less than about 17 cp and having reducing functional groups selected from the group consisting of aldehyde and aldehyde type functional groups at the C6 and C1 positions but predominating at the C1 position.
    Type: Application
    Filed: May 2, 2006
    Publication date: November 23, 2006
    Inventors: Zheng Tan, Damaris Lorenzoni, Gopal Goyal
  • Publication number: 20060144535
    Abstract: The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of paper or paper board. Additionally, the texturized microcrystalline cellulose may be used as a starting material for production of paper or paper board.
    Type: Application
    Filed: January 25, 2006
    Publication date: July 6, 2006
    Inventors: Xuan Nguyen, Zheng Tan
  • Patent number: 7037405
    Abstract: The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of paper or paper board. Additionally, the texturized microcrystalline cellulose may be used as a starting material for production of paper or paper board.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: May 2, 2006
    Assignee: International Paper Company
    Inventors: Xuan Truong Nguyen, Zheng Tan
  • Publication number: 20050061455
    Abstract: A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp.
    Type: Application
    Filed: September 23, 2003
    Publication date: March 24, 2005
    Inventors: Zheng Tan, Xuan Nguyen, Karen Maurer
  • Publication number: 20040226671
    Abstract: The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of paper or paper board. Additionally, the texturized microcrystalline cellulose may be used as a starting material for production of paper or paper board.
    Type: Application
    Filed: May 14, 2003
    Publication date: November 18, 2004
    Inventors: Xuan Truong Nguyen, Zheng Tan
  • Patent number: 5529662
    Abstract: Cellulosic pulps are bleached with ozone in an ozone bleaching stage in an aqueous medium containing an additive in an effective amount not exceeding 5% weight concentration of the aqueous medium. The additive is selected from a group consisting of N-alkylated ureas, N-alkylated lactams and N-alkylated amides. pH in the Z stage is operated under conventional ozone bleaching conditions, but preferably at high consistency and at low temperature, below 5.degree. C.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: June 25, 1996
    Assignee: MacMillan Bloedel Limited
    Inventors: Zheng Tan, Marco Solinas