Patents by Inventor Alexander Wei

Alexander Wei 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: 9250238
    Abstract: Pathogens are detected through the use of mutation-resistant ligands.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: February 2, 2016
    Assignee: Purdue Research Foundation
    Inventors: Philip S. Low, Alexander Wei, Ronald G. Reifenberger, Youngsoon Kim, Avijit Kumar Adak, David Lyvers, Kulbhushan Durugkar, Derek Doorneweerd, Rajendra P. Bandari, Rajesh Kumar Pandey, Alexei Leonov, Walter A. Henne, Yeong E. Kim
  • Patent number: 8995052
    Abstract: A solid-state MOPA includes a mode-locked laser delivering a train of pulses. The pulses are input to a fast E-O shutter, including polarization-rotating elements, polarizing beam-splitters, and a Pockels cell that can be driven alternatively by high voltage (HV) pulses of fixed long and short durations. A multi-pass amplifier follows the E-O shutter. The E-O shutter selects every Nth pulse from the input train and delivers the selected pulses to the multi-pass amplifier. The multi-pass amplifier returns amplified seed-pulses to the E-O shutter. The shutter rejects or transmits the amplified pulses depending on whether the HV-pulse duration is respectively short or long. Transmitted amplified pulses are delivered to a transient amplifier configured for separately suppressing first-pulse over-amplification and residual pulse leakage.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: March 31, 2015
    Assignee: Coherent Kaiserslautern GmbH
    Inventors: Ralf Knappe, Albert Seifert, Alexander Weis
  • Publication number: 20150070753
    Abstract: A solid-state MOPA includes a mode-locked laser delivering a train of pulses. The pulses are input to a fast E-O shutter, including polarization-rotating elements, polarizing beam-splitters, and a Pockels cell that can be driven alternatively by high voltage (HV) pulses of fixed long and short durations. A multi-pass amplifier follows the E-O shutter. The E-O shutter selects every Nth pulse from the input train and delivers the selected pulses to the multi-pass amplifier. The multi-pass amplifier returns amplified seed-pulses to the E-O shutter. The shutter rejects or transmits the amplified pulses depending on whether the HV-pulse duration is respectively short or long. Transmitted amplified pulses are delivered to a transient amplifier configured for separately suppressing first-pulse over-amplification and residual pulse leakage.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 12, 2015
    Applicant: COHERENT KAISERSLAUTERN GMBH
    Inventors: Ralf KNAPPE, Albert SEIFERT, Alexander Weis
  • Publication number: 20130196872
    Abstract: Pathogens are detected through the use of mutation-resistant ligands.
    Type: Application
    Filed: June 24, 2011
    Publication date: August 1, 2013
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: Philip S. Low, Alexander Wei, Ronald G. Reifenberger, Youngsoon Kim, Avijit Adak, David Lyvers
  • Patent number: 7803568
    Abstract: The present invention is directed to methods and products related to carbodithioate ligands bonded to surfaces. The invention is further directed to molecular and biomolecular sensing methods based on analyte recognition by carbodithioate ligands bonded to surfaces.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: September 28, 2010
    Assignee: Purdue Research Foundation
    Inventors: Alexander Wei, Yan Zhao
  • Patent number: 7610074
    Abstract: A method of forming an image of a sample, comprising: forming an image of a mixture, by exposing the mixture to electromagnetic radiation; wherein the mixture comprises the sample and plasmon-resonant nanoparticles, and wherein the electromagnetic radiation is in the frequency range of infra-red to ultraviolet light.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: October 27, 2009
    Assignees: The Board of Trustees of the University of Illinois, Purdue Research Foundation
    Inventors: Stephen A. Boppart, Alexander Wei
  • Patent number: 7521568
    Abstract: Enantiopure substituted 4-deoxypentenosides (4-DPs) and related dihydropyrans (DHPs) are prepared from common carbohydrates via a novel process. The 4-DPs and related DHPs are amenable to a broad range of stereoselective transformations and are used as synthetic intermediates to prepare a variety of enantiopure tetrahydropyrans (THPs), including rare or exotic sugars and other complex THPs of commercial or medicinal value. In one embodiment of the instant invention, 4-DPs are converted to L-sugars in a novel process that offers distinct advantages over known synthetic methods.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: April 21, 2009
    Assignee: Purdue Research Foundation
    Inventors: Alexander Wei, Fabien P. Boulineau
  • Publication number: 20080124776
    Abstract: The present invention is directed to methods and products related to carbodithioate ligands bonded to surfaces. The invention is further directed to methods of inducing cell injury or death. Such methods may be useful in the treatment of diseases such as cancer.
    Type: Application
    Filed: September 10, 2007
    Publication date: May 29, 2008
    Inventor: Alexander Wei
  • Publication number: 20070174012
    Abstract: A method of and article for determining photomask inspection capabilities. The article comprises a photomask having a first array of a plurality of test pattern shapes that include ordered variations of a first shape variable, from a largest to a smallest dimension, and a second array of a plurality of test pattern shapes, that include the ordered variations of the first shape variable and further include ordered variations of a second shape variable, from a largest to a smallest dimension. The method includes inspecting the first array of test pattern shapes of the photomask in order of the variations of the first shape variable. If at least two consecutive first test pattern shapes in the first array fail an inspection criteria, the failed consecutive first test pattern shapes are marked as failed.
    Type: Application
    Filed: January 25, 2006
    Publication date: July 26, 2007
    Inventors: Karen Badger, Emily Gallagher, Ian Stobert, Alexander Wei
  • Publication number: 20060240489
    Abstract: The present invention is directed to methods and products related to carbodithioate ligands bonded to surfaces. The invention is further directed to molecular and biomolecular sensing methods based on analyte recognition by carbodithioate ligands bonded to surfaces.
    Type: Application
    Filed: April 20, 2006
    Publication date: October 26, 2006
    Inventors: Alexander Wei, Yan Zhao
  • Publication number: 20050171433
    Abstract: A method of forming an image of a sample, comprising: forming an image of a mixture, by exposing the mixture to electromagnetic radiation; wherein the mixture comprises the sample and plasmon-resonant nanoparticles, and wherein the electromagnetic radiation is in the frequency range of infra-red to ultraviolet light.
    Type: Application
    Filed: January 8, 2004
    Publication date: August 4, 2005
    Inventors: Stephen Boppart, Alexander Wei
  • Publication number: 20050128842
    Abstract: The present invention is directed to an integrated nanostructure with one or more electrically conductive nanowires and one or more annular magnetic nanostructures. Magnetic nanoparticles can form annular assemblies encircling the nanowire in the presence of a magnetic field produced by the passage of a current through the nanowire. The annular nanostructures support bistable magnetic flux closure states, which can be switched or polarized depending on the direction of the current through the nanowire.
    Type: Application
    Filed: November 5, 2004
    Publication date: June 16, 2005
    Inventor: Alexander Wei
  • Patent number: 6899947
    Abstract: A method for enhancing the dispersibility of calixarene-stabilized nanoparticles, which can be assembled into ordered, planar arrays of monoparticulate thickness, ring-like assemblies of discrete particle count, and other configurations.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: May 31, 2005
    Assignee: Purdue Research Foundation
    Inventors: Alexander Wei, Beomseok Kim
  • Patent number: 6865058
    Abstract: An actuator assembly includes a rotatable actuator arm mounted on the base of a disc drive. The actuator arm includes a metallic member seated on a non-metallic body. A proximal end of a load beam is mounted on the actuator arm and a distal end of the load beam supports a head. The actuator assembly also includes a connection between the metallic member and the load beam that secures the load beam to the actuator arm.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: March 8, 2005
    Assignee: Seagate Technology LLC
    Inventors: Todd Warren Kube, Alexander Wei Chang, Bruce Lynn Blakeslee, Ernest Paul Lee, William Leon Rugg
  • Publication number: 20040229039
    Abstract: Method of treating nanoparticles including treating the nanoparticles with a surfactant having multiple terminal olefins, crosslinking the surfactant by olefin metathesis, and functionalizing the surfactant using ligands.
    Type: Application
    Filed: June 9, 2003
    Publication date: November 18, 2004
    Inventors: Alexander Wei, Balasubramanian Ramjee, Jesus Hernandez-Torres
  • Patent number: 6704165
    Abstract: Method and apparatus for forming a disc drive actuator assembly. A rigid actuator arm formed of printed circuit board (PCB) material is configured for placement over a rotatable disc. A head-gimbal assembly (HGA) is provided comprising a data transducing head, a flexible suspension assembly and a conductor which is connected to the head and routed along the flexible suspension assembly. A Z-axis conductive adhesive film is used to mechanically and electrically connect the HGA with a distal end of the PCB actuator arm. The Z-axis conductive adhesive film is substantially conductive across the thickness of the film and is substantially nonconductive along the length and width of the film. In a preferred embodiment, the film establishes a grounding path to dissipate electrostatic charge in the HGA. In another embodiment, the film establishes a data signal path for the head.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: March 9, 2004
    Assignee: Seagate Technology LLC
    Inventors: Todd W. Kube, Bruce Lynn Blakeslee, Alexander Wei Chang
  • Patent number: 6678121
    Abstract: An actuator arm for a disc drive data storage device has an upper outer surface in a first plane, a lower outer surface in a second plane substantially parallel to the first plane, a peripheral outer surface substantially perpendicular to the first and second planes, and a voice coil embedded within the outer surfaces of the actuator arm. The actuator arm is used in a disc drive containing one or more data storage discs and preferably has a pre-amplifier embedded within the outer surfaces of the actuator arm as well as conductors preferably between the read/write head and the pre-amplifier within the outer surfaces of the actuator arm.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: January 13, 2004
    Assignee: Seagate Technology LLC
    Inventors: Ernest Paul Lee, Alexander Wei Chang, Khosrow Mohajerani, Michael Henry Lennard
  • Publication number: 20030181402
    Abstract: Novel, enantiopure, substituted 4-deoxypentenosides (4-DPs) and related dihydropyrans (DHPS) are prepared from common carbohydrates via a novel process. The 4-DPs and related DHPs are amenable to a broad range of stereoselective transformations and are used as synthetic intermediates to prepare a variety of enantiopure tetrahydropyrans (THPs), including rare or exotic sugars and other complex THPs of commercial or medicinal value. In one embodiment of the instant invention, 4-DPs are converted to L-sugars in a novel process that offers distinct advantages over known synthetic methods.
    Type: Application
    Filed: December 13, 2002
    Publication date: September 25, 2003
    Inventors: Alexander Wei, Fabien P. Boulineau
  • Publication number: 20030086206
    Abstract: An actuator assembly includes a rotatable actuator arm mounted on the base of a disc drive. The actuator arm includes a metallic member seated on a non-metallic body. A proximal end of a load beam is mounted on the actuator arm and a distal end of the load beam supports a head. The actuator assembly also includes a connection between the metallic member and the load beam that secures the load beam to the actuator arm.
    Type: Application
    Filed: June 20, 2002
    Publication date: May 8, 2003
    Inventors: Todd Warren Kube, Alexander Wei Chang, Bruce Lynn Blakeslee, Ernest Paul Lee, William Leon Rugg
  • Publication number: 20030068496
    Abstract: A method for enhancing the dispersibility of calixarene-stabilized nanoparticles, which can be assembled into ordered, planar arrays of monoparticulate thickness, ring-like assemblies of discrete particle count, and other configurations.
    Type: Application
    Filed: August 12, 2002
    Publication date: April 10, 2003
    Inventors: Alexander Wei, Beomseok Kim