Patents by Inventor Shreya Roy-Choudhury

Shreya Roy-Choudhury 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).

  • Sulfonated poly(arylene ether) membranes with high monovalent salt rejection even in the presence of mixed salt feeds that contain multivalent salts
    Patent number: 11525034
    Abstract: Described herein are water desalination membranes and methods of desalinating water. Sulfonated poly(arylene ether) polymers are also disclosed, including those comprising one or more sulfonate groups at various points along the polymer chain. The polymers may be used as at least a portion of a water desalination membrane. The polymers described herein are useful for preventing transport of aqueous ionic species (e.g., Na+ and Cl?) across a membrane made from the polymers while allowing water to pass. Chlorine-stable polymers are described, as well as polymers exhibiting good performance for rejecting monovalent cations in the presence of polyvalent cations.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: December 13, 2022
    Assignees: Board of Regents, The University of Texas System, Virginia Tech Intellectual Properties, Inc.
    Inventors: Judy S. Riffle, Ozma R. Lane, Amin Daryaei, Shreya Roy-Choudhury, Benny D. Freeman, Eui Soung Jang, Gurtej S. Narang, John J. Lesko, Trevor Schumacher
  • ULTRAVIOLET LIGHT-BLOCKING COATED PHARMACEUTICAL PACKAGES
    Publication number: 20220073256
    Abstract: According to one or more embodiments disclosed herein, a coated pharmaceutical package may comprise a glass container comprising a first surface and a second surface opposite the first surface, wherein the first surface is an outer surface of the glass container, and wherein the glass container in an uncoated state has an average light transmittance in the UVB and UVC spectrum of at least 50% through a single wall of the coated package. The coated pharmaceutical package may further comprise a coating positioned over at least a portion of the first surface of the glass container, wherein the coated pharmaceutical package has an average light transmittance in the UVC spectrum of less than 50% through a single wall of the coated package.
    Type: Application
    Filed: September 3, 2021
    Publication date: March 10, 2022
    Inventors: Andrei Gennadyevich Fadeev, David Henry, Valerie Claudine Lacarriere, John Stephen Peanasky, Shreya Roy Choudhury, Kristi Lynn Simonton, Bryan Henry Smith, Jean-Jacques Bernard Theron
  • SULFONATED POLY(ARYLENE ETHER) MEMBRANES WITH HIGH MONOVALENT SALT REJECTION EVEN IN THE PRESENCE OF MIXED SALT FEEDS THAT CONTAIN MULTIVALENT SALTS
    Publication number: 20200362107
    Abstract: Described herein are water desalination membranes and methods of desalinating water. Sulfonated poly(arylene ether) polymers are also disclosed, including those comprising one or more sulfonate groups at various points along the polymer chain. The polymers may be used as at least a portion of a water desalination membrane. The polymers described herein are useful for preventing transport of aqueous ionic species (e.g., Na+ and Cl?) across a membrane made from the polymers while allowing water to pass. Chlorine-stable polymers are described, as well as polymers exhibiting good performance for rejecting monovalent cations in the presence of polyvalent cations.
    Type: Application
    Filed: July 31, 2020
    Publication date: November 19, 2020
    Applicants: Board of Regents, The University of Texas System, Virginia Tech Intellectual Properties, Inc.
    Inventors: Judy S. Riffle, Ozma R. Lane, Amin Daryaei, Shreya Roy-Choudhury, Benny D. Freeman, Eui Soung Jang, Gurtej S. Narang, John J. Lesko, Trevor Schumacher