Patents by Inventor Tuyen T. Nguyen

Tuyen T. Nguyen 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: 10106625
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: October 23, 2018
    Assignee: HERCULES LLC
    Inventors: Todd A. Brugel, Tuyen T. Nguyen
  • Publication number: 20160376380
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.
    Type: Application
    Filed: July 22, 2016
    Publication date: December 29, 2016
    Applicant: HERCULES INCORPORATED
    Inventors: Todd A. BRUGEL, Tuyen T. NGUYEN
  • Patent number: 9492550
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: November 15, 2016
    Assignee: Hercules LLC
    Inventors: Todd A. Brugel, Tuyen T. Nguyen, Sangrama Sahoo, Divya Tewari, Yuda Zong
  • Patent number: 9321851
    Abstract: The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: April 26, 2016
    Assignee: HERCULES INCORPORATED
    Inventors: Prachur Bhargava, Glen T. Carroll, Tuyen T. Nguyen, Kostantin A. Vaynberg
  • Patent number: 9249280
    Abstract: The viscosity of solutions of nonionic synthetic associative thickeners is controlled by adding organophosphates to the solution of associative thickeners. The associative thickeners are hydrophobically modified polymers and the organophosphates include one or more hydrophobic groups.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: February 2, 2016
    Assignee: HERCULES INCORPORATED
    Inventors: Bruce K. Fillipo, Tuyen T. Nguyen, Arjun C. Sau
  • Publication number: 20150191642
    Abstract: The presently disclosed and/or claimed inventive concept(s) relates generally to a cementing fluid for use in high temperature wellbore application. More particularly, the presently disclosed and/or claimed inventive concept(s) relates to a cementing fluid comprising an aqueous fluid, a hydraulically-active cementitous material, and a suspending agent, wherein the suspending agent is a high molecular weight hydrophobic copolymer or a cross-linked hydrophobic copolymer particulate. Additionally, the presently disclosed and/or claimed inventive concept(s) relates generally to the methods of making the cementing fluid containing the suspending agent.
    Type: Application
    Filed: December 22, 2014
    Publication date: July 9, 2015
    Inventors: Tuyen T. Nguyen, Cuiyue Lei, Hong Yang, Bilal S. Marie
  • Publication number: 20150112000
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a method for making a particular product comprising a nonionic synthetic associative (NSAT) rheology modifier and a dissolution promotion water soluble additive. The method comprising the steps of: (a) obtaining the NSAT theology modifier and the dissolution promotion water soluble additive; (b) melting the NSAT theology modifier and the dissolution promotion water soluble additive; (c) mixing the molten NSAT theology modifier and the dissolution promotion water soluble additive; and (d) producing the particulate product from step (c). The NSAT rheology modifier is selected from the group consisting of hydrophobically-modified ethoxylated urethane (HEUR), hydrophobically-modified polyethylene glycol (HMPEG), and hydrophobically-modified polyacetal-polyether (HMPAPE). The particulate product prepared from the method is incorporated into a waterborne paint formula.
    Type: Application
    Filed: December 23, 2014
    Publication date: April 23, 2015
    Inventors: Prachur Bhargava, Paul C. Gillette, Tuyen T. Nguyen
  • Publication number: 20140249235
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 4, 2014
    Applicant: HERCULES INCORPORATED
    Inventors: Todd A. Brugel, Tuyen T. Nguyen, Sangrama Sahoo, Divya Tewari, Yuda Zong
  • Patent number: 8748542
    Abstract: A synthetic polymer has a water-soluble or water-swellable polyurethane backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: June 10, 2014
    Assignee: Hercules Incorporated
    Inventors: Kirill N. Bakeev, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
  • Patent number: 8709390
    Abstract: This invention relates to non-uniformly substituted (“blocky”) hydroxyethylcelluloses (HECs) and derivatives thereof that exhibit associative behavior in both neat solutions and in filled systems. The HECs and derivatives thereof exhibit unique and highly desirable rheology and are more efficient in thickening aqueous systems than prior art HEC products. These blocky HECs can be distinguished from prior art and commercial HEC products by having an unsubstituted anhydroglucose trimer ratio (U3R) greater than 0.21 and the hydroxyethyl molar substitution greater than about 1.3 and less than about 5. This invention also relates to processes for making blocky HEC and uses thereof in functional systems.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: April 29, 2014
    Assignee: Hercules Incorporated
    Inventors: Petrus Wilhelmus Franciscus Arisz, Kate M. Lusvardi, Tuyen T. Nguyen
  • Publication number: 20130237651
    Abstract: The viscosity of solutions of nonionic synthetic associative thickeners is controlled by adding organophosphates to the solution of associative thickeners. The associative thickeners are hydrophobically modified polymers and the organophosphates include one or more hydrophobic groups.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: HERCULES INCORPORATED
    Inventors: Bruce K. Fillipo, Tuyen T. Nguyen, Arjun C. Sau
  • Publication number: 20130030091
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a particulate product. The particulate product comprises a nonionic synthetic associative thickener NSAT) rheology modifier and a dissolution promotion water soluble additive. The NSAT rheology modifier is selected from the group consisting of hydrophobically-modified ethoxylated urethane (HEUR), hydrophobically-modified polyethylene glycol and hydrophobically-modified polyacetal-polyether (HMPAPE). The particulate product is incorporated into a waterborne paint formula.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: HERCULES INCORPORATED
    Inventors: Prachur Bhargava, Paul C. Gillette, Tuyen T. Nguyen
  • Publication number: 20120247367
    Abstract: The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.
    Type: Application
    Filed: March 5, 2012
    Publication date: October 4, 2012
    Inventors: Prachur Bhargava, Glen T. Carroll, Tuyen T. Nguyen, Kostantin A. Vaynberg
  • Publication number: 20100324177
    Abstract: A synthetic polymer has a water-soluble or water-swellable polyethyleneglycol backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 23, 2010
    Inventors: Kirill N. BAKEEV, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
  • Patent number: 7851416
    Abstract: An oilfield servicing fluid composition containing an aldehyde guar produced by enzymatic oxidation of a non-derivatized, straight guar or of a guar derivative. The enzyme used to oxidize the guar to the aldehyde guar is galactose oxidase, which may be combined with catalase or catalase and peroxidase. The aldehyde guar is useful as an effective gelling agent for oilfield servicing fluids such as hydraulic fracturing fluids and stimulation fluids.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: December 14, 2010
    Assignee: Hercules Incorporated
    Inventors: Mohand Melbouci, Tuyen T. Nguyen, Teng-Shau Young
  • Publication number: 20090253832
    Abstract: A synthetic polymer has a water-soluble or water-swellable polyurethane backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.
    Type: Application
    Filed: June 18, 2009
    Publication date: October 8, 2009
    Inventors: Kirill N. BAKEEV, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
  • Patent number: 7550542
    Abstract: A synthetic polymer has a water-soluble or water-swellable polymer backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: June 23, 2009
    Assignee: Hercules Incorporated
    Inventors: Kirill N. Bakeev, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
  • Patent number: 7531591
    Abstract: An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols, ethoxylated acetyleneic diols, phosphate esters, dialkyl sulfosuccinates, and mixtures thereof. This aqueous dispersion improves the incorporation of the HM-PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: May 12, 2009
    Assignee: Hercules Incorporated
    Inventors: Kirill N. Bakeev, James G. Binder, Theo Klootwijk, Dirk Kruythoff, Betty Maagdenberg-Roels, Tuyen T. Nguyen, Jeffrey K. Politis, Willimlen G. Salomons
  • Publication number: 20040016015
    Abstract: A method for introducing a heterologous nucleic acid of interest into a plant to thereby produce a recombinant plant is carried out by (a) providing a recombinant nucleic acid of interest, the recombinant nucleic acid comprising the heterologous nucleic acid of interest, and preferably including (i) a matrix attachment region (MAR) positioned 5′ to the heterologous DNA, (ii) a MAR positioned 3′ to the heterologous nucleic acid of interest, or (iii) a MAR positioned 5′ to the heterologous nucleic acid of interest and a MAR positioned 3′ to the heterologous nucleic acid of interest; (b) providing meristem tissue of the plant of interest; (c) introducing the recombinant nucleic acid of interest into the meristem tissue; and then (d) propagating a recombinant plant from the meristem tissue, preferably by a direct propagation technique.
    Type: Application
    Filed: May 28, 2003
    Publication date: January 22, 2004
    Inventors: Thanh-Tuyen T. Nguyen, George C. Allen, Georgia L. Helmer, William F. Thompson
  • Publication number: 20040016014
    Abstract: A method for introducing a heterologous nucleic acid of interest into a plant to thereby produce a recombinant plant is carried out by (a) providing a recombinant nucleic acid of interest, the recombinant nucleic acid comprising the heterologous nucleic acid of interest, and preferably including (i) a matrix attachment region (MAR) positioned 5′ to the heterologous DNA, (ii) a MAR positioned 3′ to the heterologous nucleic acid of interest, or (iii) a MAR positioned 5′ to the heterologous nucleic acid of interest and a MAR positioned 3′ to the heterologous nucleic acid of interest; (b) providing meristem tissue of the plant of interest; (c) introducing the recombinant nucleic acid of interest into the meristem tissue; and then (d) propagating a recombinant plant from the meristem tissue, preferably by a direct propagation technique.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 22, 2004
    Inventors: Thanh-Tuyen T. Nguyen, George C. Allen, Georgia L. Helmer, William F. Thompson