Patents by Inventor Shi Wah Choong

Shi Wah Choong 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: 11666941
    Abstract: This invention discloses a method for controlling nanoscopic wetting near or at a molecular scale for synthetic material applications. In particular this invention relates to a method for preparing a monolayer or thin film with a patterned nanoscopic wetting surface using a ‘sitting’ phase of polymerizable amphiphile, wherein hydrophobic alkyl chains of the amphiphile extend along the supporting surface and the amphiphile molecules align side-to-side, effectively forming a repeating cross-section of bilayer with alternating hydrophilic and hydrophobic stripes of a ˜6 nm pitch tunable based on the chain length of the amphiphile. Products prepared according to the methods disclosed herein are within the scope of this invention. In some embodiments, monolayers or thin films so prepared are transferable.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: June 6, 2023
    Assignee: Purdue Research Foundation
    Inventors: Shelley A Claridge, Shi Wah Choong, Jae Jin Bang, Shane Richard Russell
  • Publication number: 20200061667
    Abstract: This invention discloses a method for controlling nanoscopic wetting near or at a molecular scale for synthetic material applications. In particular this invention relates to a method for preparing a monolayer or thin film with a patterned nanoscopic wetting surface using a ‘sitting’ phase of polymerizable amphiphile, wherein hydrophobic alkyl chains of the amphiphile extend along the supporting surface and the amphiphile molecules align side-to-side, effectively forming a repeating cross-section of bilayer with alternating hydrophilic and hydrophobic stripes of a ˜6 nm pitch tunable based on the chain length of the amphiphile. Products prepared according to the methods disclosed herein are within the scope of this invention. In some embodiments, monolayers or thin films so prepared are transferable.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 27, 2020
    Applicant: Purdue Research Foundation
    Inventors: Shelley A Claridge, Shi Wah Choong, Jae Jin Bang, Shane Russell
  • Patent number: 10525502
    Abstract: This invention discloses a method for controlling nanoscopic wetting near or at a molecular scale for synthetic material applications. In particular this invention relates to a method for preparing a monolayer or thin film with a patterned nanoscopic wetting surface using a ‘sitting’ phase of polymerizable amphiphile, wherein hydrophobic alkyl chains of the amphiphile extend along the supporting surface and the amphiphile molecules align side-to-side, effectively forming a repeating cross-section of bilayer with alternating hydrophilic and hydrophobic stripes of a ˜6 nm pitch tunable based on the chain length of the amphiphile. Products prepared according to the methods disclosed herein are within the scope of this invention. In some embodiments, monolayers or thin films so prepared are transferable.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: January 7, 2020
    Assignee: Purdue Research Foundation
    Inventors: Shelley A Claridge, Shi Wah Choong, Jae Jin Bang, Shane Richard Russell
  • Patent number: 10325765
    Abstract: The invention generally relates to systems and methods for continuous or batch wise sampling of a surface for analysis of trace chemical constituents that may be present on the surface by mass spectrometry. Integration of time and place of the sampling and analysis processes allows real-time on-the-spot response to the analytical data and can take into account that material is not necessarily uniformly distributed on a surface. A further feature of the systems and methods of the invention is that the swabbing process also cleans the surface being analyzed. Accordingly, systems and methods of the invention provide an integrated approach that allows for a surface to be cleaned, sampled and analyzed in real-time, providing a faster and more efficient way to verify or validate whether a manufacturing vessel is sufficiently clean to start another production.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: June 18, 2019
    Assignee: Purdue Research Foundation
    Inventor: Shi Wah Choong
  • Publication number: 20180229265
    Abstract: This invention discloses a method for controlling nanoscopic wetting near or at a molecular scale for synthetic material applications. In particular this invention relates to a method for preparing a monolayer or thin film with a patterned nanoscopic wetting surface using a ‘sitting’ phase of polymerizable amphiphile, wherein hydrophobic alkyl chains of the amphiphile extend along the supporting surface and the amphiphile molecules align side-to-side, effectively forming a repeating cross-section of bilayer with alternating hydrophilic and hydrophobic stripes of a ˜6 nm pitch tunable based on the chain length of the amphiphile. Products prepared according to the methods disclosed herein are within the scope of this invention. In some embodiments, monolayers or thin films so prepared are transferable.
    Type: Application
    Filed: January 19, 2018
    Publication date: August 16, 2018
    Applicant: Purdue Research Foundation
    Inventors: Shelley A. Claridge, Shi Wah Choong, Jae Jin Bang, Shane Russell
  • Publication number: 20180102242
    Abstract: The invention generally relates to systems and methods for continuous or batch wise sampling of a surface for analysis of trace chemical constituents that may be present on the surface by mass spectrometry. Integration of time and place of the sampling and analysis processes allows real-time on-the-spot response to the analytical data and can take into account that material is not necessarily uniformly distributed on a surface. A further feature of the systems and methods of the invention is that the swabbing process also cleans the surface being analyzed. Accordingly, systems and methods of the invention provide an integrated approach that allows for a surface to be cleaned, sampled and analyzed in real-time, providing a faster and more efficient way to verify or validate whether a manufacturing vessel is sufficiently clean to start another production.
    Type: Application
    Filed: October 6, 2017
    Publication date: April 12, 2018
    Applicant: Purdue Research Foundation
    Inventor: Shi Wah Choong