Patents by Inventor Reaz Ahmed Chowdhury

Reaz Ahmed Chowdhury 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: 11827795
    Abstract: The present disclosure relates to a novel cellulose nanomaterial (CN) based waterborne polyurethane coating, and to methods of making and using the novel cellulose nanomaterial (CN) based waterborne polyurethane coating.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: November 28, 2023
    Assignee: Purdue Research Foundation
    Inventors: Jeffrey Paul Youngblood, Reaz Ahmed Chowdhury, Sami Miguel El Awad Azrak
  • Publication number: 20230286810
    Abstract: The invention provides silica wet gel, silica aerogel, and methods that can be used to form an enhanced silica aerogel sheet having fewer optical defects along with other desirable properties.
    Type: Application
    Filed: March 9, 2023
    Publication date: September 14, 2023
    Inventors: Reaz Ahmed Chowdhury, Mohammad Arifuzzaman, Kellen Kitzman, Kari B. Myli
  • Publication number: 20230286813
    Abstract: The invention provides silica wet gel, silica aerogel, and methods that can be used to form an enhanced silica aerogel sheet having fewer optical defects along with other desirable properties.
    Type: Application
    Filed: March 9, 2023
    Publication date: September 14, 2023
    Inventors: Reaz Ahmed Chowdhury, Mohammad Arifuzzaman, Kellen Kitzman, Kari B. Myli
  • Publication number: 20230286812
    Abstract: The invention provides silica wet gel, silica aerogel, and methods that can be used to form an enhanced silica aerogel sheet having fewer optical defects along with other desirable properties.
    Type: Application
    Filed: March 9, 2023
    Publication date: September 14, 2023
    Inventors: Reaz Ahmed Chowdhury, Mohammad Arifuzzaman, Kellen Kitzman, Kari B. Myli
  • Patent number: 11340479
    Abstract: The invention provides an elastomeric optical device having a first optical state and a second optical state. The device is transparent when in the first optical state and translucent or opaque when in the second optical state. The device comprises, in sequence, a first transparent electrode, a dielectric layer, an elastomer layer, and a second transparent electrode. The elastomer layer preferably has certain mechanical properties, such as a Shore OOO hardness of less than 15, and/or certain chemical properties, such as being substantially devoid of unreacted sites. The second transparent electrode is configured to compress the elastomer layer in response to an electric field between the first and second transparent electrodes, such that when the elastomeric optical device is in the second optical state, the elastomer layer is compressed between the first and second transparent electrodes. Methods of operating an elastomeric optical device are also provided.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: May 24, 2022
    Assignee: CARDINAL CG COMPANY
    Inventors: Reaz Ahmed Chowdhury, Luis Octavio Arellano, Keith James Burrows
  • Publication number: 20210047534
    Abstract: The present disclosure relates to a novel cellulose nanomaterial (CN) based waterborne polyurethane coating, and to methods of making and using the novel cellulose nanomaterial (CN) based waterborne polyurethane coating.
    Type: Application
    Filed: August 10, 2020
    Publication date: February 18, 2021
    Applicant: Purdue Research Foundation
    Inventors: Jeffrey Paul Youngblood, Reaz Ahmed Chowdhury, Sami Miguel El Awad Azrak
  • Publication number: 20200257141
    Abstract: The invention provides an elastomeric optical device having a first optical state and a second optical state. The device is transparent when in the first optical state and translucent or opaque when in the second optical state. The device comprises, in sequence, a first transparent electrode, a dielectric layer, an elastomer layer, and a second transparent electrode. The elastomer layer preferably has certain mechanical properties, such as a Shore OOO hardness of less than 15, and/or certain chemical properties, such as being substantially devoid of unreacted sites. The second transparent electrode is configured to compress the elastomer layer in response to an electric field between the first and second transparent electrodes, such that when the elastomeric optical device is in the second optical state, the elastomer layer is compressed between the first and second transparent electrodes. Methods of operating an elastomeric optical device are also provided.
    Type: Application
    Filed: May 1, 2020
    Publication date: August 13, 2020
    Inventors: Reaz Ahmed Chowdhury, Luis Octavio Arellano, Keith James Burrows