Patents by Inventor Shijun Jia

Shijun Jia 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).

  • Double wire GMAW welding torch assembly and process
    Patent number: 9186745
    Abstract: A double wire GMAW welding apparatus having a wire spacing adjustable torch assembly is disclosed. The double wire torch assembly has a wire spacing adjusting mechanism, by means of wire spacing adjustment the torch assembly can be used for a non-synchronized metal transfer weld process. The wires remain parallel before, during, after wire spacing adjustment.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: November 17, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shijun Jia, Douglas Steyer, Xiangui Cao, Mohan Chobe, Tianming He
  • DOUBLE WIRE GMAW WELDING TORCH ASSEMBLY AND PROCESS
    Publication number: 20120055911
    Abstract: A double wire GMAW welding apparatus having a wire spacing adjustable torch assembly is disclosed. The double wire torch assembly has a wire spacing adjusting mechanism, by means of wire spacing adjustment the torch assembly can be used for a non-synchronized metal transfer weld process. The wires remain parallel before, during, after wire spacing adjustment.
    Type: Application
    Filed: December 16, 2009
    Publication date: March 8, 2012
    Inventors: Shijun Jia, Douglas Steyer, Xiangui Cao, Mohan Chobe, Tianming He
  • Heteroatomic regioregular poly(3-substitutedthiophenes) for photovoltaic cells
    Patent number: 7790979
    Abstract: Regioregular polythiophene polymers can be used in photovoltaic applications including copolymers and blends. The polymer can comprise heteroatoms in the side groups. Better efficiencies can be achieved.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: September 7, 2010
    Assignee: Plextronics, Inc.
    Inventors: Shawn P. Williams, Darin W. Laird, Troy D. Hammond, Andrew W. Hannah, Elena E. Sheina, Shijun Jia
  • Doped interfacial modification layers for stability enhancement for bulk heterojunction organic solar cells
    Publication number: 20100147386
    Abstract: Organic photovoltaic (OPV) devices comprising an organic semiconductor doped with a metal or organic dopant to form an interfacial modification layer, where the layer is disposed on an active layer including a conjugated polymer and a fullerene are described. In the layer, the organic semiconductor can be BPhen or TPBI, and the dopant can be a metal or an organic material. In the active layer, the conjugated polymer can be P3HT and the fullerene can be PCBM or indenyl-substituted fullerene. Improved OPV efficiency and lifetime can be achieved. Good testing results are obtained despite high humidity and high temperature, and modules can be made.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 17, 2010
    Inventors: Jessica Benson-smith, Christohper T. Brown, Shijun Jia, Darin W. Laird, Christine L. McGuiness, Bal Mukund Dhar
  • Copolymers of soluble poly(thiophenes) with improved electronic performance
    Publication number: 20060237695
    Abstract: Polythiophene copolymers having tunable work functions and oxidation voltage onset. The ratio of monomer can be varied to achieve the desired property for a particular application. One monomer can be unsubstituted thiophene. The copolymer microstructure can be random. Another monomer can be a 3-substituted thiophene such as 3-alkyl or a heteroatom substituted substituent. Heterojunction polymer photovoltaic cells can be fabricated with excellent voltage onset properties compared to devices having corresponding homopolymers.
    Type: Application
    Filed: March 16, 2006
    Publication date: October 26, 2006
    Inventors: Shawn Williams, Darin Laird, Caton Goodman, Traian Sarbu, Shijun Jia
  • Hole injection/transport layer compositions and devices
    Publication number: 20060175582
    Abstract: Compositions for use in HIL/HTL applications include intrinsically conductive polymer, planarizing agent, and dopant, which are soluble in non-aqueous solvents. Block copolymers of regioregular alkyl/alkoxy- and aryl-substituted polythiophenes can be used. The compositions can be formed into thin films. Excellent efficiency and lifetime stability can be achieved.
    Type: Application
    Filed: February 9, 2006
    Publication date: August 10, 2006
    Inventors: Troy Hammond, Shawn Williams, Elena Sheina, Darin Laird, Andrew Hannah, Shijun Jia
  • Heteroatomic regioregular poly(3-substitutedthiophenes) for photovoltaic cells
    Publication number: 20060076050
    Abstract: Regioregular polythiophene polymers can be used in photovoltaic applications including copolymers and blends. The polymer can comprise heteroatoms in the side groups. Better efficiencies can be achieved.
    Type: Application
    Filed: September 26, 2005
    Publication date: April 13, 2006
    Inventors: Shawn Williams, Darin Laird, Troy Hammond, Andrew Hannah, Elena Sheina, Shijun Jia