Patents by Inventor Duc-Hahn Nguyen

Duc-Hahn 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: 9598342
    Abstract: Processes for the production of acetic acid by carbonylation of methanol and reactive derivatives thereof in a liquid phase reaction medium, wherein the reaction medium comprises a finite amount of water, a homogeneous catalyst, an alkyl halide promoter, and a catalyst stabilizer/co-promoter comprising an imidazolium cation R1R2Im+ as an iodide salt, wherein R1 and R2 are each independently a substituted or unsubstituted alkyl or cycloalkyl, with the proviso that R1 and R2 are not the same.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: March 21, 2017
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Carole Marie Le Berre, Duc Hahn Nguyen, Philippe Gilles Serp, Philippe Kalck, G. Paull Torrence
  • Publication number: 20140309455
    Abstract: Processes for the production of acetic acid by carbonylation of methanol and reactive derivatives thereof in a liquid phase reaction medium, wherein the reaction medium comprises a finite amount of water, a homogeneous catalyst, an alkyl halide promoter, and a catalyst stabilizer/co-promoter comprising an imidazolium cation R1R2Im+ as an iodide salt, wherein R1 and R2 are each independently a substituted or unsubstituted alkyl or cycloalkyl, with the proviso that R1 and R2 are not the same.
    Type: Application
    Filed: March 14, 2014
    Publication date: October 16, 2014
    Applicant: Celanese International Corporation
    Inventors: Carole Marie Le Berre, Duc Hahn Nguyen, Philippe Gilles Serp, Philippe Kalck, G. Paull Torrence
  • Publication number: 20070015909
    Abstract: Adiponectin variants comprising one or more amino acid modifications to corresponding wild-type adiponectins at positions having predetermined hydrophobicity, predetermined polarity, predetermined electrostatic potential, Met, aromatic amino acid, Cys corresponding to position 152 of SEQ ID NO:1, amino acid affecting isoelectric point of the wild-type or variant adiponectin, amino acid affecting beta sheet formation, helix capping, or dipole interactions, or a combination thereof, wherein the adiponectin variants exhibit improved stability, solubility or soluble expression, expression yield, the ability to induce phosphorylation of AMPK, or a combination thereof, as compared to the corresponding wild-type adiponectins.
    Type: Application
    Filed: January 9, 2006
    Publication date: January 18, 2007
    Inventors: Darian Cash, Arthur Chirino, John Desjarlais, Sergei Ezhevsky, Gregory Moore, Duc-Hahn Nguyen, Jonathan Zalevsky