Chemical and Biomolecular Engineering

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  • Inventor(s):
    Shramik Sengupta, Hsueh-Chia Chang
    Patent Number:
    US 8635028 B2
    Description:

    An improved system and method is provided for detecting viable bacteria in a suspension sample. A sample of a suspension in which bacterial presence is suspected is collected from a source and a portion of the sample transferred to a microfluidic unit. A series of analysis signals at different frequencies are applied to the sample portion. An impedance is measured via a signal analyzer for the sample portion for each of the analysis signals to define an impedance data set. An initial bulk cap…

    Date Issued:
    2014-01-21
    Resource Type
    Patent
  • Inventor(s):
    Jason C. Hicks, Gregory T. Neumann
    Patent Number:
    US 8969599 B2
    Description:

    The invention provides a catalyst system for catalytic fast pyrolysis comprising a cerium-incorporated HZSM-5 zeolite (Catalyst 1), and methods of making and using the same. The invention also provides a process for reducing coke formation during catalytic fast pyrolysis of biomass using HZSM-5, wherein the process can include incorporating cerium into the HZSM-5 zeolite to produce Catalyst 1 prior to the catalytic fast pyrolysis.

    Date Issued:
    2015-03-03
    Resource Type
    Patent
  • Inventor(s):
    Manuel Koucouthakis, Douglas J. Steinke, Alexander Mukasyan, Jeremiah D. E. White
    Patent Number:
    US 9321692 B2
    Description:

    Production of pore-free carbon/carbon-silicon carbide composite materials with mechanical properties making them suitable for use in such applications as the production of aircraft landing system brake components including brake discs. The method includes: providing a porous carbon-carbon composite preform; surrounding the porous carbon-carbon composite preform with silicon powder to form an intermediate construct; applying a uniaxial load to the construct; applying direct electrical current …

    Date Issued:
    2016-04-26
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan, Douglas J. Steinke
    Patent Number:
    US 7588179 B2
    Description:

    Resin-impregnated carbon fiber composites containing metal inserts. Carbon fibers or a carbon fiber preform are bonded to a metal structural member. Once the carbon fiber-metal bond is established, the fiber-metal assembly or hybrid preform is impregnated with resin, to form an article in which bonding between the metal structural member and the composite remainder of the article is greatly enhanced. In a process embodiment, a metal insert, e.g. a steel insert, is provided in contact with par…

    Date Issued:
    2009-09-15
    Resource Type
    Patent
  • Inventor(s):
    Hsueh-Chia Chang, Zilin Chen, Fu-Chih Hsu, David Battigelli
    Patent Number:
    US 7960180 B2
    Description:

    Methods and apparatus to capture and release microbe particles using amino-functionalized silica substrates are described. An example apparatus adapted to capture a microbe particle includes a silica substrate and a positively charged material to at least partially coat the silica substrate. The positive charged material includes an aminopropyl functional group.

    Date Issued:
    2011-06-14
    Resource Type
    Patent
  • Inventor(s):
    Zachary Gagnon, Hsueh-Chia Chang
    Patent Number:
    US 7744738 B2
    Description:

    The present invention provides a method and apparatus for use in rapid particle transportation, separation, focusing, characterization, and release. Dielectrophoresis and electro-osmotic driven fluid convection are used independently or in tandem as the driving forces for particle manipulation and on occasion characterization. Although dielectrophoresis has been acknowledged for decades as a powerful technique for particle manipulation and characterization, long processing times and measureme…

    Date Issued:
    2010-06-29
    Resource Type
    Patent
  • Inventor(s):
    Michael M. Crouse, Albert E. Miller, Juan Jiang, David T. Crouse, Subash C. Basu
    Patent Number:
    US 6869671 B2
    Description:

    A thin film based nanoporous alumina template has been developed which allows the in situ removal of an electrically insulating alumina barrier layer at the pore bases. This barrier free nanoporous system has great utility for electrodeposition of a wide variety of nanowire materials. An exemplary multilayer thin film precursor is provided comprising Al (anodization layer), Ti (diffusion barrier) and Pt (active electrode) on a Si substrate. Aluminum anodization in sulfuric acid with a subsequ…

    Date Issued:
    2005-03-22
    Resource Type
    Patent
  • Inventor(s):
    Arvind Varma, Alexander Mukasyan, Bing-Yun Li
    Patent Number:
    US 6896846 B2
    Description:

    A method for synthesis of biomedical alloys has been developed based on combustion phenomena. This low pressure combustion synthesis (LPCS) technique may be used for production of Co-based and other metal-based alloys, which cover the entire range of orthopaedic implants, including total hip and knee replacements, as well as hone screws, plates, and wires. A unique aspect of the method is that combustion synthesis under low ambient gas pressure allows one to produce pore-free (>99% theoret…

    Date Issued:
    2005-05-24
    Resource Type
    Patent
  • Inventor(s):
    Agnes E. Ostafin, Robert Nooney, Edward J. Maginn
    Patent Number:
    US 6913825 B2
    Description:

    Nanoparticles, nanocomposites, and methods for making the nanoparticles and nanocomposites are disclosed. Illustrated methods include preparing a nanocomposite particle by binding a silicate compound to the surface of a core particle in an aqueous suspension, adding a silicate source and an organic surfactant template, and stirring the aqueous suspension to obtain silicate growth. The resultant nanoparticles and nanocomposites have desired mesoporous silicate structure

    Date Issued:
    2005-07-05
    Resource Type
    Patent
  • Inventor(s):
    Albert E. Miller, Supriyo Bandyopadhyay
    Patent Number:
    US 5747180 B2
    Description:

    A method of fabricating two-dimensional regimented and quasi periodic arrays of metallic and semiconductor nanostructures (quantum dots) with diameters of .about.100 .ANG.(10 nm) includes the steps of polishing and anodizing a substrate to form a regimented quasi-periodic array of nanopits. The array forms a template for metallic or semiconductor material. The desired material is deposited in the nanopits by immersing the substrate in an appropriate solution and using the substrate as one cat…

    Date Issued:
    1998-05-05
    Resource Type
    Patent
  • Inventor(s):
    Eduardo E. Wolf
    Patent Number:
    US 5688474 B2
    Description:

    A method of microfabricating a matrix of evenly distributed catalytic articles, with the matrix then being used to treat reactants in a stream of gases. The matrix is created by depositing areas of conductive material on a nonconductive base wafer or substrate, and then depositing catalyst particles in electrical communication with the conductive material so that a series of localized electrical fields can be created upon the introduction of a power source. A dielectric material surrounding t…

    Date Issued:
    1997-11-18
    Resource Type
    Patent
  • Inventor(s):
    Albert E. Miller, Gautam Banerjee
    Patent Number:
    US 6183547 B2
    Description:

    A composition for inhibiting corrosion of metal surfaces comprises permanganate and a very low concentration of chromium (VI). The concentration of chromium (VI) in the aqueous solution is less than about 100 micrograms per liter, and the concentration of permanganate is about 0.2% to about 20% by weight of the aqueous solution. In another embodiment of the invention, a composition for inhibiting corrosion of metal surfaces includes permanganate and acetic acid. The concentration of acetic ac…

    Date Issued:
    2001-02-06
    Resource Type
    Patent