Chemical and Biomolecular Engineering

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  • Inventor(s):
    James J. Carberry, Charles Benjamin Alcock
    Patent Number:
    US 5286698 B2
    Description:

    Solid oxide solutions of the formula La.sub.1-x Sr.sub.x CrO.sub.3-.differential. have been found to exhibit surprisingly high specific activity as catalysts for oxidation and hydrogenation reactions. The oxide solutions can be utilized in particulate form or applied as films to the surfaces of refractory substrates. The oxide solution catalysts are expected to be a viable alternative to the noble metal catalysts now used commercially for treatment of combustion chamber exhaust gases to reduc…

    Date Issued:
    1994-02-15
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Paul J. McGinn, Hongmei An
    Patent Number:
    US 8356475 B2
    Description:

    Described is a method of slowly releasing a catalyst for, inter alia, the purpose of soot oxidation in a particulate filter. An example method includes incorporating an alkali metal oxide in a glass. Slow leaching of the alkali from the glass provides a means to gradually deliver the catalyst over extended periods. Additionally, the example method includes increasing the amount of alkaline metal ions that may be leached from the glass.

    Date Issued:
    2013-01-22
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan
    Patent Number:
    US 8178212 B2
    Description:

    Method for chemical bonding of fiberglass fibers to steel surfaces to prepare the steel for bonding with carbon composite material. This fiber-bonding step greatly increases the strength of the subsequent metal-composite bond. The fiberglass fibers which are chemically bonded to the steel provide a high surface area interface to entangle with carbon fibers in the composite component, and thereby inhibit crack formation on the boundary surface between the steel and composite components when th…

    Date Issued:
    2012-05-15
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Mark Muldoon, Joan F. Brennecke, Edward J. Maginn, Eric F. V. Scriven, Colin H. McAteer
    Patent Number:
    US 7687513 B2
    Description:

    Disclosed herein are aminopyridinium cations and compositions containing these cations. Piperidino pyridinium cations and compositions containing these cations are also described. Ionic compositions, particularly liquid ionic compositions that contain the aminopyridinium cation or piperidino pyridinium cation are also described. Methods of enhancing the thermal stability of a compound, particularly an ionic compound, using the aminopyridinium or piperidino pyridinium cations, are also present…

    Date Issued:
    2010-03-30
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Joan F. Brennecke, Edward J. Maginn
    Patent Number:
    US 6579343 B2
    Description:

    The present invention provides a method for purifying a gas by contacting the gas with a liquid ionic compound. Natural gas may be purified, removing water and carbon dioxide, by contacting the natural gas with a liquid ionic compound.

    Date Issued:
    2003-06-17
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    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
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Slawomir T. Fryska, Mark L. La Forest, Roger L. Klinedinst, Alexander Mukasyan
    Patent Number:
    US 7922845 B2
    Description:

    An apparatus for bonding a first carbon composite to a second carbon composite through a reactant layer includes a housing, and a pair of conductive press plates electrically isolated from the housing. The press plates are adapted to position the two parts to be bonded with a reactant layer therebetween. The press plates are subjected to an electrical potential and a clamping force, sufficient to initiate a combustion reaction that creates a molten ceramic to bond together the carbon-carbon c…

    Date Issued:
    2011-04-12
    Record Visibility:
    Public
    Resource Type
    Patent