Patents by Inventor Paul Kim-Ho Chu

Paul Kim-Ho Chu 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).

  • Publication number: 20230226254
    Abstract: An antibacterial implantable medical device or medical material. The surface of an implantable medical device or medical material has a titanium coating formed thereon. Titanium nitride nanowires are formed that extend from the titanium coating at a selected angle to exert a mechanical force on bacteria bilayer membranes sufficient to at least partially disrupt the bacteria bilayer membranes. In one aspect, the titanium nitride nanowires are formed from grown titanium dioxide nanowires by converting the titanium dioxide nanowires to titanium nitride in a heated nitrogen-containing environment. The titanium nitride nanowires are optionally charged to further enhance antibacterial properties.
    Type: Application
    Filed: November 8, 2022
    Publication date: July 20, 2023
    Inventors: Guomin WANG, Paul Kim Ho CHU, Kaiwei TANG, Zheyi MENG
  • Publication number: 20220056610
    Abstract: Provided herein is an electrolyte composition including a metal silicate or a metal aluminate, a metal phosphate, zinc oxide particles, and a complexing agent useful for plasma electrolytic oxidation treatment of a surface of a metal substrate.
    Type: Application
    Filed: August 4, 2021
    Publication date: February 24, 2022
    Inventors: Paul Kim Ho Chu, Zhongzhen WU, Liangliang LIU, King Yu Ricky FU
  • Patent number: 9711738
    Abstract: The design and synthesis of six nickel charge transfer (CT) complexes are described herein. The six nickel CT complexes have a nickel center, two organic ligands coordinated with the nickel center to form a dianionic square planar supramolecule and an organic counter-cation as represented by The ligands and counter-cations are selected to optimize properties, such as molecular alignment, film morphology, and molecular packaging. Described herein, the ligands can be 2,3-pyrazinedithiol (L1), 1,2-benzenedithol (L2) or 2,3-quinoxalinedithol (L3) and the counter-cations can be diquat (2,2?-ebpy) or methyl viologen (4,4?-mbpy). The six nickel CT complexes can also be utilized semiconductor devices, such as thin film transistors or inverters. Processes are also provided for the fabrication of semiconductors devices. The processes can include fabricating a substrate with a bilayer octadecylphosphonic acid (ODPA)/Al2O3 dielectric and applying one of the six nickel charge transfer (CT) complexes to the substrate.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: July 18, 2017
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Vellaisamy A. L. Roy, Zong-Xiang Xu, Paul Kim Ho Chu, Tat Kun Kwok
  • Publication number: 20150179957
    Abstract: The design and synthesis of six nickel charge transfer (CT) complexes are described herein. The six nickel CT complexes have a nickel center, two organic ligands coordinated with the nickel center to form a dianionic square planar supramolecule and an organic counter-cation as represented by The ligands and counter-cations are selected to optimize properties, such as molecular alignment, film morphology, and molecular packaging. Described herein, the ligands can be 2,3-pyrazinedithiol (L1), 1,2-benzenedithol (L2) or 2,3-quinoxalinedithol (L3) and the counter-cations can be diquat (2,2?-ebpy) or methyl viologen (4,4?-mbpy). The six nickel CT complexes can also be utilized semiconductor devices, such as thin film transistors or inverters. Processes are also provided for the fabrication of semiconductors devices. The processes can include fabricating a substrate with a bilayer octadecylphosphonic acid (ODPA)/Al2O3 dielectric and applying one of the six nickel charge transfer (CT) complexes to the substrate.
    Type: Application
    Filed: March 3, 2015
    Publication date: June 25, 2015
    Inventors: Vellaisamy A. L. Roy, Zong-Xiang Xu, Paul Kim Ho Chu, Tat Kun Kwok
  • Patent number: 8981096
    Abstract: The design and synthesis of six nickel charge transfer (CT) complexes are described herein. The six nickel CT complexes have a nickel center, two organic ligands coordinated with the nickel center to form a dianionic square planar supramolecule and an organic counter-cation as represented by The ligands and counter-cations are selected to optimize properties, such as molecular alignment, film morphology, and molecular packaging. Described herein, the ligands can be 2,3-pyrazinedithiol (L1), 1,2-benzenedithol (L2) or 2,3-quinoxalinedithol (L3) and the counter-cations can be diquat (2,2?-ebpy) or methyl viologen (4,4?-mbpy). The six nickel CT complexes can also be utilized semiconductor devices, such as thin film transistors or inverters. Processes are also provided for the fabrication of semiconductors devices. The processes can include fabricating a substrate with a bilayer octadecylphosphonic acid (ODPA)/Al2O3 dielectric and applying one of the six nickel charge transfer (CT) complexes to the substrate.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: March 17, 2015
    Assignee: City University of Hong Kong
    Inventors: Vellaisamy A. L. Roy, Zong-Xiang Xu, Paul Kim Ho Chu, Tat Kun Kwok
  • Publication number: 20120276687
    Abstract: The design and synthesis of six nickel charge transfer (CT) complexes are described herein. The six nickel CT complexes have a nickel center, two organic ligands coordinated with the nickel center to form a dianionic square planar supramolecule and an organic counter-cation. The ligands and counter-cations are selected to optimize properties, such as molecular alignment, film morphology, and molecular packaging. Described herein, the ligands can be 2,3-pyrazinedithiol (L1), 1,2-benzenedithol (L2) or 2,3-quinoxalinedithol (L3) and the counter-cations can be diquat (2,2?-ebpy) or methyl viologen (4,4?-mbpy). The six nickel CT complexes can also be utilized semiconductor devices, such as thin film transistors or inverters. Processes are also provided for the fabrication of semiconductors devices. The processes can include fabricating a substrate with a bilayer octadecylphosphonic acid (ODPA)/Al2O3 dielectric and applying one of the six nickel charge transfer (CT) complexes to the substrate.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 1, 2012
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Vellaisamy A. L. Roy, Zong-Xiang Xu, Paul Kim Ho Chu, Tat Kun Kwok
  • Publication number: 20110166251
    Abstract: Novel hybrid materials and fabrication methods thereof are provided. The novel hybrid materials can include a biodegradable polymer and a biodegradable metallic material. The hybrid material can also include a coupling agent between the biodegradable metallic material and the biodegradable polymer. A method of fabricating a hybrid material can include performing a surface treatment process on the biodegradable metallic material, and then either performing a solvent formation method or a thermal formation method.
    Type: Application
    Filed: July 14, 2010
    Publication date: July 7, 2011
    Inventors: Karen Hoi Man Wong, Kelvin Wai Kwok Yeung, Kenneth Man Chee Cheung, Keith Dip Kei Luk, John Kin On Lam, Paul Kim Ho Chu
  • Publication number: 20110046747
    Abstract: This invention involves a plasma treated and controllable release antimicrobial peptide coated titanium alloy for surgical implantation, where the alloy with antimicrobial properties is fabricated using surface techniques without adversely compromising its biocompatibility and original mechanical properties. The surface techniques form antimicrobial layers on the alloy capable of resisting microbial adhesion and proliferation, while allowing mammalian cell adhesion and proliferation when the alloy is implanted to human body. In one embodiment, PIII&D is applied to incorporate ions, electrons, free radicals, atoms or molecules on a titanium alloy substrate. A pressurized hydrothermal treatment can be carried out to establish reactive functional groups for antimicrobial purpose or for connecting the substrate and external antimicrobial molecules.
    Type: Application
    Filed: February 16, 2010
    Publication date: February 24, 2011
    Inventors: Kelvin Wai Kwok Yeung, Kenneth Man Chee Cheung, Keith Dip Kei Luk, Che Yan Yeung, Richard Yi Tsun Kao, Paul Kim Ho Chu
  • Patent number: 7803234
    Abstract: The invention provides a method for making surface treated shape memory materials such as from NiTi alloy using plasma immersion ion implantation and deposition and related ion-beam and plasma-based techniques to alter the surface properties of those materials primarily for biomedical applications. The surfaces are treated with nitrogen, oxygen, and carbon, but become bio-inactive after implanted with other elements such as silicon.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: September 28, 2010
    Assignees: Versitech Limited
    Inventors: Kelvin W. K. Yeung, Ray W. Y. Poon, Paul Kim-Ho Chu, Kenneth M. C. Cheung, William W. Lu