Patents by Inventor Jinhua Chen

Jinhua Chen 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: 20100040927
    Abstract: An object is to provide an electrolyte membrane that maintains excellent cell characteristics for a long time under high temperature and low water retention, as this is the most important point in fuel cells. A process for producing a polymer electrolyte membrane for fuel cells is provided, which process comprises in sequence: forming graft molecular chains by graft-polymerization of a vinyl silane coupling agent on a polymer film substrate that has phenyl groups capable of holding sulfonic acid groups; introducing sulfonic acid groups into phenyl groups contained in the graft molecular chains; and hydrolyzing and condensing alkoxy groups contained in the graft molecular chains so that a silane crosslinked structure is introduced between the graft molecular chains. A polymer electrolyte membrane produced by the process is also provided.
    Type: Application
    Filed: September 5, 2007
    Publication date: February 18, 2010
    Inventors: Masaru Yoshida, Masaharu Asano, Jinhua Chen, Yasunari Maekawa, Toshimitsu Tachibana, Yozo Nagai, Soji Nishiyama
  • Publication number: 20090277838
    Abstract: The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC) and solid-phase extraction (SPE). The compositions include a porous solid support (e.g., silica gels, silica monoliths or synthetic organic resins) having an exterior surface and pore openings defined by “interior walls”. To the solid support are covalently bound organic ion-exchange ligands (e.g., silyl ligands), which incorporate at least one ion-exchange group (e.g., ionic or ionizable group). The compositions further include micro-particles (e.g., latex particles) incorporating ion-exchange groups having a charge that is opposite to the charge found on the support. The micro-particles are bound to the exterior surface of the support (e.g., via electrostatic forces).
    Type: Application
    Filed: May 9, 2008
    Publication date: November 12, 2009
    Applicant: Dionex Corporation
    Inventors: Xiaodong Liu, Christopher A. Pohl, Jinhua Chen, L. Andy Woodruff
  • Patent number: 7557232
    Abstract: The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC). The compositions include a substrate (e.g., silica gel), covalently bound to a compound, which includes both a hydrophobic moiety and a hydrophilic moiety, which is preferably a 1,2-diol moiety. The hydrophobic moiety is sufficiently hydrophobic for the compositions to exhibit reversed phase characteristics and typically incorporates at least 5 carbon atoms in sequence. Based on having both hydrophilic and hydrophobic functionalities, the new stationary phases exhibit unique chromatographic properties. For example, these media can be used in either hydrophilic (HILIC) mode, in which the mobile phase includes a high percentage of an organic solvent, or in reversed phase mode, in which the mobile phase contains a higher percentage of an aqueous solvent.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: July 7, 2009
    Assignee: Dionex Corporation
    Inventors: Xiaodong Liu, Christopher A. Pohl, Jinhua Chen
  • Publication number: 20090068534
    Abstract: A vinyl monomer is graft polymerized on an aromatic hydrocarbon-based polymer film substrate to introduce graft chains into the substrate and thereafter a functional monomer represented by the following formula and having sulfonic acid groups or functional groups capable of conversion to sulfonic acid groups is graft polymerized to introduce the sulfonic acid groups or the functional groups capable of conversion to sulfonic acid groups: where R is an aromatic ring or an aliphatic chain; X is (1) —OH, (2) —OLi, —ONa or —OK, (3) —F or —Cl, or (4) —OCnH2n+1 where n is an integer of 1 to 7. Since the graft chains obtained by graft polymerization of the vinyl monomer can also be utilized as scaffold polymers, the graft polymerizability of the functional monomer to the aromatic hydrocarbon-based polymer film substrate is sufficiently improved to enable the preparation of a polymer electrolyte membrane that excels not only in proton conductivity and mechanical strength but also in dimensional stability.
    Type: Application
    Filed: August 22, 2008
    Publication date: March 12, 2009
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Jinhua Chen, Yasunari Maekawa, Masaharu Asano, Masaru Yoshida
  • Publication number: 20080312350
    Abstract: An aromatic polymer film substrate, or a grafted aromatic polymer film substrate having a monomer introduced therein as graft chains is irradiated with ionizing radiation to impart a crosslinked structure. The aromatic polymer film substrate or the grafted aromatic polymer film substrate, provided with the crosslinked structure, is directly sulfonated to obtain a crosslinked aromatic polymer electrolyte membrane. The crosslinked aromatic polymer electrolyte membrane has low water uptake, high proton conductivity, low methanol permeability, high chemical stability, and excellent mechanical characteristics. A method for producing the crosslinked aromatic polymer electrolyte membrane is also provided.
    Type: Application
    Filed: January 31, 2008
    Publication date: December 18, 2008
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Jinhua Chen, Yasunari Maekawa, Masaharu Asano, Masaru Yoshida
  • Publication number: 20080293959
    Abstract: The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC). The compositions include a substrate (e.g., silica gel), covalently bound to a compound, which includes both a hydrophobic moiety and a hydrophilic moiety, which is preferably a 1,2-diol moiety. The hydrophobic moiety is sufficiently hydrophobic for the compositions to exhibit reversed phase characteristics and typically incorporates at least 5 carbon atoms in sequence. Based on having both hydrophilic and hydrophobic functionalities, the new stationary phases exhibit unique chromatographic properties. For example, these media can be used in either hydrophilic (HILIC) mode, in which the mobile phase includes a high percentage of an organic solvent, or in reversed phase mode, in which the mobile phase contains a higher percentage of an aqueous solvent.
    Type: Application
    Filed: May 25, 2007
    Publication date: November 27, 2008
    Applicant: Dionex Corporation
    Inventors: Xiaodong Liu, Christopher A. Pohl, Jinhua Chen
  • Publication number: 20080293721
    Abstract: The present invention provides compounds having the general structure I, or a pharmaceutically acceptable salt thereof: wherein Z is selected from a group consisting of O, C, N, and S; each of Ar1, Ar2, and Ar3 is a moiety selected from a group consisting of an aryl and a substituted aryl; Y is selected from a group consisting of S, O, CH2 and SO2; K is selected from a group consisting CH2, CF2, O, NH, and SO2; each of n1 and n2 is an integer selected from a group consisting of 0, 1, 2, 3, and 4; and each of x, y, m1 and m2 is an integer selected from a group consisting of 0 and 1. Pharmaceutical compositions based on compounds I are also provided for treatment of a neurological disorders, diseases, or pathologies, and for treatment of infectious diseases.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 27, 2008
    Applicant: Burnham Institute for Medical Research
    Inventors: Maurizio Pellecchia, Jinhua Chen, Ziming Zhang
  • Patent number: 7165196
    Abstract: A test system and method for testing a serializer/de-serializer system. The system includes a pair of serializer/de-serializers each having a serial data receive port and a serial data transmit port. The serializer/de-serializers are adapted to be placed in a loop-back mode in response to a loop-back signal to pass data fed to the serial data receive port to the serial data transmit port. A backplane connects the serial data transmit port of one serializer/de-serializer to the serial data receive port of a second one of the serializer/de-serializers. A tester passes data to the first serial data receive port and receives data from the data transmit port of the second one of the serializer/de-serializers with both serializer/de-serializes placed in the loop-back mode.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: January 16, 2007
    Assignee: EMC Corporation
    Inventors: Ofer Porat, Jinhua Chen, Marlon Ramroopsingh, Alexander Rabinovich
  • Patent number: 7033541
    Abstract: The present invention relates to compounds and more particularly to compounds which are useful for the determination of bicarbonate and the delivery of bicarbonate to a non-aqueous solution. The invention further relates to an optical sensor for the determination of bicarbonate in a liquid sample.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: April 25, 2006
    Inventors: Thomas W. Bell, Jinhua Chen, Alisher B. Khasanov
  • Patent number: 6972607
    Abstract: A method and circuit for regenerating clock signals. The method and circuit convert clock signals having either single- ended clock pulses or differential clock pulses into clock signals having substantially the same voltage swing. In one embodiment, the single-ended clock pulses are provided by a TTL logic circuit and the differential clock pulses are produced by a PECL logic circuit.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: December 6, 2005
    Assignee: EMC Corporation
    Inventors: Jinhua Chen, Marlon Ramroopsingh
  • Publication number: 20040209858
    Abstract: The present invention relates to the use of compounds of formula (I) 1
    Type: Application
    Filed: October 22, 2003
    Publication date: October 21, 2004
    Inventors: Youssef L. Bennani, Steve A. Chamberlin, Sanjay R. Chemburkar, Jinhua Chen, Michael J. Dart, Ashok K. Gupta, Lei Wang
  • Publication number: 20040204396
    Abstract: The present invention relates to the use of compounds of formula (I) 1
    Type: Application
    Filed: October 22, 2003
    Publication date: October 14, 2004
    Inventors: Youseff L. Bennani, William H. Bunnelle, Sou-Jen Chang, Sanjay R. Chemburkar, Jinhua Chen, Michael J. Dart, Dilinie Fernando, Yi-Yin Ku, Mark Lockwood, Lei Wang
  • Publication number: 20040191917
    Abstract: The present invention relates to compounds and more particularly to compounds which are useful for the determination of bicarbonate and the delivery of bicarbonate to a non-aqueous solution. The invention further relates to an optical sensor for the determination of bicarbonate in a liquid sample.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Applicant: Roche Diagnostics Corporation
    Inventors: Thomas W. Bell, Jinhua Chen, Alisher B. Khasanov
  • Publication number: 20040077618
    Abstract: The present invention relates to the use of compounds of formula (I) 1
    Type: Application
    Filed: October 22, 2002
    Publication date: April 22, 2004
    Inventors: Youssef L. Bennani, Steve A. Chamberlin, Sanjay R. Chemburkar, Jinhua Chen, Michael J. Dart, Ashok K. Gupta, Lei Wang
  • Publication number: 20040077616
    Abstract: The present invention relates to the use of compounds of formula (I) 1
    Type: Application
    Filed: October 22, 2002
    Publication date: April 22, 2004
    Inventors: Youssef L. Bennani, William H. Bunnelle, Sou-Jen Chang, Sanjay R. Chemburkar, Jinhua Chen, Michael J. Dart, Dilinie P. Fernando, Yi-Yin Ku, Mark Lockwood, Lei Wang