Patents Assigned to Ngee Ann Polytechnic
  • Patent number: 11148099
    Abstract: A graphene-based membrane and a method of producing the same are disclosed. The graphene-based membrane may include a graphene-polymer composite, wherein the graphene-polymer composite may consist of an amine functionalized graphene and a polymer containing an anhydride group as a linker for linking the amine functionalized graphene to the polymer. The graphene-based membrane may be constructed of a single-layer. A method may include reacting a polymer containing an anhydride with an amine functionalized graphene in presence of a solvent to form an intermediate product; and thermal imidizing the intermediate product to form a graphene grafted polymer composite for use in fabricating a graphene-based membrane.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: October 19, 2021
    Assignee: Ngee Ann Polytechnic
    Inventors: James Antony Prince, Sowrirajalu Bhuvana, Anbharasi Vanangamudi, Gurdev Singh
  • Publication number: 20200164318
    Abstract: A graphene-based membrane and a method of producing the same are disclosed. The graphene-based membrane may include a graphene-polymer composite, wherein the graphene-polymer composite may consist of an amine functionalized graphene and a polymer containing an anhydride group as a linker for linking the amine functionalized graphene to the polymer. The graphene-based membrane may be constructed of a single-layer. A method may include reacting a polymer containing an anhydride with an amine functionalized graphene in presence of a solvent to form an intermediate product; and thermal imidizing the intermediate product to form a graphene grafted polymer composite for use in fabricating a graphene-based membrane.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 28, 2020
    Applicant: Ngee Ann Polytechnic
    Inventors: James Antony PRINCE, Sowrirajalu BHUVANA, Anbharasi VANANGAMUDI, Gurdev SINGH
  • Patent number: 10336641
    Abstract: A method for producing foam glass with high open pore content using recycled waste glass. The size of the pores of the foam glass is small and uniform, and such foam glass is suitable for building material with thermal insulating and sound proofing properties. The foam glass produced by this method is lightweight, durable and has high compression strength.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: July 2, 2019
    Assignee: Ngee Ann Polytechnic
    Inventors: Xiaolong Sun, Qingchi Xu
  • Patent number: 10118128
    Abstract: This invention relates to a vacuum air gap membrane distillation system for desalination purposes. More particularly, this invention relates to a membrane distillation system with multiple cells in which the system's flux is increased due to the temperature and pressure differential within the system. The configuration of the vacuum air gap membrane distillation system allows for latent heat within the system to be recycled effectively reducing the energy consumption of the system.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: November 6, 2018
    Assignee: Ngee Ann Polytechnic
    Inventors: James Antony Prince, Gurdev Singh, Tiruvannamalai Subbarayan Shanmugasundaram
  • Publication number: 20180036675
    Abstract: This invention relates to a system for continuously dehumidifying humid gas. More particularly, this invention relates to a system that continuously dehumidifies gas using a liquid desiccant dehumidifying module, a regeneration modules utilizing a membrane distillation module to regenerate diluted liquid desiccant and means for connecting the two modules together.
    Type: Application
    Filed: December 18, 2015
    Publication date: February 8, 2018
    Applicant: Ngee Ann Polytechnic
    Inventors: James Selvaraj Antony Prince, Gurdev Singh, Kwok Ho Lam, Ayyanar Neelamegam, Belinda Owen
  • Patent number: 9751052
    Abstract: This invention relates to a triple layer composite nanofiber membrane for Membrane Distillation (MD) applications. The triple layer membrane has an extremely hydrophobic nanofiber layer, a hydrophobic microporous middle layer and a hydrophilic backing layer for MD applications.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 5, 2017
    Assignee: Ngee Ann Polytechnic
    Inventors: Gurdev Singh, James Antony Prince
  • Patent number: 9421293
    Abstract: A multi-layered filtration medium for detoxification of chemical contaminants and disinfection of biological contaminants. The filtration medium includes two disinfection nanofiber layers and one detoxification nanofiber layer disposed between the two disinfection nanofiber layers. The filtration medium is loaded with high content of a detoxifying material which capable of achieving about 95% detoxification efficiency with no leaching of the detoxifying material. The filtration medium may also include a medicinal substance for medical applications and a sensor for indicating the lifetime of the filtration medium.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: August 23, 2016
    Assignee: Ngee Ann Polytechnic
    Inventors: Gurdev Singh, Anbharasi Vanangamudi, James Antony Prince
  • Publication number: 20140326658
    Abstract: This invention relates to a triple layer composite nanofiber membrane for Membrane Distillation (MD) applications. The triple layer membrane has an extremely hydrophobic nanofiber layer, a hydrophobic microporous middle layer and a hydrophilic backing layer for MD applications.
    Type: Application
    Filed: November 17, 2011
    Publication date: November 6, 2014
    Applicant: Ngee Ann Polytechnic
    Inventors: Gurdev Singh, James Antony Prince
  • Patent number: 8363316
    Abstract: An optical configuration for a digital holographic microscope and a method for digital holographic microscopy are presented. In one embodiment, digital off-axis holograms are obtained using a cube beam splitter (110) to both split and combine a diverging spherical wavefront emerging from a microscope objective (108). When a plane numerical reference wavefront is used for the reconstruction of the recorded digital hologram, the phase curvature introduced by the microscope objective (108) together with the illuminating wave to the object wave can be physically compensated.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: January 29, 2013
    Assignees: Nanyang Technological University, Ngee Ann Polytechnic
    Inventors: Anand Krishna Asundi, Weijuan Qu, Oi Choo Chee
  • Publication number: 20120090613
    Abstract: A breathing apparatus comprising: an inlet configured to receive pressurised gases, an outlet configured to diffuse the pressurised gases within the dead space of a face mask, a detachable nozzle manifold configured to pass the pressurised gases from the inlet to the outlet, and a seal configured to substantially air tight seal the nozzle manifold between a user's face and a bottom inner surface of the mask.
    Type: Application
    Filed: October 14, 2010
    Publication date: April 19, 2012
    Applicant: Ngee Ann Polytechnic
    Inventors: Kok Meng Woon, Ah Kat Tan, Kaya Totong, Teck Soon Ong, Geoffrey Chor Yong Tan
  • Publication number: 20110043878
    Abstract: An optical configuration for a digital holographic microscope and a method for digital holographic microscopy are presented. In one embodiment, digital off-axis holograms are obtained using a cube beam splitter (110) to both split and combine a diverging spherical wavefront emerging from a microscope objective (108). When a plane numerical reference wavefront is used for the reconstruction of the recorded digital hologram, the phase curvature introduced by the microscope objective (108) together with the illuminating wave to the object wave can be physically compensated.
    Type: Application
    Filed: August 21, 2009
    Publication date: February 24, 2011
    Applicants: Nanyang Technological University, Ngee Ann Polytechnic
    Inventors: Anand Krishna Asundi, Weijuan Qu, Oi Choo
  • Patent number: 7103242
    Abstract: A photonic switch for switching an incoming light beam from a first path to a second path, the photonic switch comprising a light sensitive material with a refractive index able to be changed by an induced light.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: September 5, 2006
    Assignee: Ngee Ann Polytechnic
    Inventor: Hegde M. Gopalkrishna
  • Patent number: 6396343
    Abstract: The instrumentation amplifier circuit of the present invention is particularly suited for amplifying ECG signals, rejecting common mode signals and removing a DC offset. The preferred embodiment of the present invention basically comprises a front-stage differential amplifier, and a common-mode rejection circuit. By employing a twin-T network, the front stage differential amplifier is able to simultaneously remove the DC offset and achieve high gain using standard off-the-shelf components. The common mode differential gain, however, is zero, which is the desired result. The common-mode rejection circuit removes the common-mode signal to yield only the amplified ECG signal. The present amplifier circuit has a much greater DC offset tolerance than the prior art amplifier while the Common Mode Rejection Ratio (CMRR), residual noise at the output, and the input dynamic range is comparable to that of the prior art amplifier. Moreover, it requires fewer operational amplifiers.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: May 28, 2002
    Assignee: Ngee Ann Polytechnic
    Inventor: Johnny Chee