Patents Assigned to The University of Dayton
  • Patent number: 6818313
    Abstract: A corrosion-inhibiting coating, process, and system that provides a tight, adherent zinc- or zinc-alloy coating that is directly deposited onto steel or cast iron surfaces for enhanced corrosion protection. A process for applying the coating is also provided. The process includes the application of two sequential aqueous baths. The first bath contains a precursor zinc compound while the second bath contains a reducing agent to deposit the zinc directly upon the steel or cast iron.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: November 16, 2004
    Assignee: University of Dayton
    Inventors: Andrew W. Phelps, Jeffrey A. Sturgill
  • Patent number: 6726781
    Abstract: A permanent magnet is provided which retains its magnetic properties and exhibits a linear extrinsic demagnetization curve at elevated temperatures up to 700° C. The magnet is represented by the general formula RE(CoWFeVCuXTY)Z, where RE is a rare earth metal selected from the group consisting of Sm, Gd, Pr, Nd, Dy, Ce, Ho, Er, La, Y, Tb, and mixtures thereof and T represents a transition metal(s) selected from the group consisting of Zr, Hf, Ti, Mn, Cr, Nb, Mo, W, V, Ni, Ta, and mixtures thereof.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: April 27, 2004
    Assignees: University of Dayton, Electron Energy Corporation
    Inventors: Marlin S. Walmer, Christina H. Chen, Shiqiang Liu, Michael H. Walmer, G. Edward Kuhl
  • Patent number: 6680016
    Abstract: A method of reinforcing a polymeric material with carbon nanofibers is provided in which carbon nanofibers are combined with a polymer and a solvent for the polymer to form a substantially homogeneous mixture, followed by removal of the solvent by evaporation or coagulation. The resulting conductive polymeric nanocomposite material exhibits high electrical and thermal conductivity, enhanced mechanical strength, abrasion resistance, and dimensional stability.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: January 20, 2004
    Assignee: University of Dayton
    Inventors: Chyi-Shan Wang, Max D. Alexander
  • Patent number: 6656641
    Abstract: Methods for enhancing conductivity of polymer-ceramic composite electrolytes are provided which include forming a polymer-ceramic composite electrolyte film by a melt casting technique and uniaxially stretching the film from about 5 to 15% in length. The polymer-ceramic composite electrolyte is also preferably annealed after stretching such that it has a room temperature conductivity of from 10−4 S cm−1 to 10−3 S cm−1. The polymer-ceramic composite electrolyte formed by the methods of the present invention may be used in lithium rechargeable batteries.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: December 2, 2003
    Assignee: University of Dayton
    Inventor: Binod Kumar
  • Publication number: 20030201031
    Abstract: Disclosed are methods for producing compositionally modified sintered RE—Fe—B-based rare earth permanent magnets, by the addition of small amounts of Nd, Cu, Ti, Nb, or other transition metals, and mixtures thereof, to maximize fracture toughness with corresponding improved machinability, while maintaining maximum energy product, said method comprising the steps of:
    Type: Application
    Filed: November 13, 2002
    Publication date: October 30, 2003
    Applicants: Electron Energy Corporation, University of Dayton
    Inventors: Shiqiang Liu, Jinfang Liu
  • Publication number: 20030201035
    Abstract: Compositionally modified, sintered RE-Fe—B-based rare earth permanent magnets demonstrate the optimum combination of mechanical and magnetic properties, thereby maximizing fracture toughness with corresponding improved machinability, while maintaining the maximum energy product (BH)max.
    Type: Application
    Filed: November 13, 2002
    Publication date: October 30, 2003
    Applicants: Electron Energy Corporation, University of Dayton
    Inventors: Shiqiang Liu, Jinfang Liu
  • Patent number: 6617764
    Abstract: The present invention provides a sensor that can be operated at high temperatures. The sensor comprises a first electrode, a second electrode, and an aluminum nitride film which lies between the first and second electrode. The sensor can be used to measure pressure, acceleration, or force at high temperatures.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: September 9, 2003
    Assignee: University of Dayton
    Inventors: James R. Sebastian, David A. Stubbs, Rollie E. Dutton
  • Patent number: 6475252
    Abstract: A liquid hydrocarbon stabilizer including a hindered phenol, and a peroxide decomposer selected from sulfides having a general formula R4—S—R5 and phosphine compounds having a general formula PR6R7R8 where R4, R5, R6, R7, and R8 are the same or different and are each alkyl, aryl, alkylaryl, arylalkyl, hydroxyalkyl, hydroxyaryl, hydroxyalkylaryl, hydroxyarylalkyl groups, or heteroatomic alkyl, aryl, alkylaryl, arylalkyl, hydroxyalkyl, hydroxyaryl, hydroxyalkylaryl, hydroxyarylalkyl groups containing nitrogen, sulfur, or oxygen. A method of treating liquid hydrocarbons with the liquid hydrocarbon is also described.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: November 5, 2002
    Assignee: University of Dayton
    Inventors: Shawn P. Heneghan, Steven S. Zabarnick, Mark S. Mick
  • Patent number: 6451132
    Abstract: A permanent magnet is provided which retains its magnetic properties and exhibits a linear extrinsic demagnetization curve at elevated temperatures up to 700° C. The magnet is represented by the general formula RE(CowFevCuxTy)z, where RE is a rare earth metal selected from the group consisting of Sm, Gd, Pr, Nd, Dy, Ce, Ho, Er, La, Y, Th, and mixtures thereof and T represents a transition metal(s) selected from the group consisting of Zr, Hf, Ti, Mn, Cr, Nb, Mo, W, V, Ni, Ta, and mixtures thereof.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: September 17, 2002
    Assignee: University of Dayton
    Inventors: Marlin S. Walmer, Christina H. Chen, Shiqiang Liu, Michael H. Walmer, G. Edward Kuhl
  • Patent number: 6423260
    Abstract: A method and apparatus for producing ordered parts by from non-ordered liquid crystal monomers. Liquid crystal monomers contain stiff, rod-like mesogenic segments which can be aligned by an external force such as shear, electric field or magnetic field, causing an anisotropy in properties. When cured in the aligned stated by photopolymerizing the aligned monomers the anisotropic structure is “locked in” resulting in materials with anisotropic physical and mechanical properties. The rigid structure of the mesogenic segments can result in cured networks with high glass transition temperatures if the spacer groups which connect the mesogenic core with the reactive end groups are kept short. Glass transition temperatures of postcured parts ranged from 75 to 148° C. depending on resin and processing conditions. A mechanical anisotropy on the order of two was measured for aligned samples.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: July 23, 2002
    Assignee: University of Dayton
    Inventors: Richard P. Chartoff, John W. Schultz, Jill S. Ullett
  • Patent number: 6380340
    Abstract: Rigid-rod monomers and polymers are provided for use in applications such as rapid prototyping, composites and adhesives. The monomers can be photocured through the end groups and then thermally post cured through the acetylene groups. The result is a highly crosslinked polymer having an effective glass transition temperature well above 200° C.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: April 30, 2002
    Assignee: University of Dayton
    Inventors: Richard P. Chartoff, Jayprakash C. Bhatt, Tat H. Tong
  • Patent number: 6369262
    Abstract: Rigid-rod monomers and polymers are provided for use in applications such as rapid prototyping, composites and adhesives. The monomers can be photocured through the end groups and then thermally post cured through the acetylene groups. The result is a highly crosslinked polymer having an effective glass transition temperature well above 200° C.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: April 9, 2002
    Assignee: University of Dayton
    Inventors: Richard P. Chartoff, Jayprakash C. Bhatt, Tat H. Tong
  • Patent number: 6359914
    Abstract: A tunable pulsed narrow bandwidth light source and a method of operating a light source are provided. The light source includes a pump laser, first and second non-linear optical crystals, a tunable filter, and light pulse directing optics.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: March 19, 2002
    Assignee: University of Dayton
    Inventors: Peter E. Powers, Thomas J. Kulp
  • Patent number: 6299819
    Abstract: A double chamber vacuum resin transfer molding process is provided comprising the initial step of providing a double chamber vacuum resin transfer molding apparatus comprising a first mold portion and a second mold portion. The first mold portion and the second mold portion are configured such that, in an engaged state, the first mold portion and the second mold portion define a mold cavity and a brim cavity. The mold cavity is isolated from the brim cavity by a compressible seal. Either or both of the first mold portion and the second mold portion are further configured to define an injection gate in communication with the mold cavity, a mold cavity vacuum port in communication with the mold cavity, and a brim cavity vacuum port in communication with the brim cavity. The first mold portion, the second mold portion, and the compressible seal are arranged such that a decrease in brim cavity pressure below atmospheric pressure causes a corresponding decrease in mold cavity volume.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 9, 2001
    Assignee: The University of Dayton
    Inventor: Kerang Ken Han
  • Patent number: 6278011
    Abstract: Two new classes of polysilahydrocarbons: Rn—Si—[CH2CH2—Si—R13](4−n)  (III) C6H(12−m)[CH2CH2SiR13]m  (IV) where R and R1 are alkyl groups having from 1 to 18 carbon atoms, “n” is an integer between 0 and 3, and “m” is an integer between 2 and 6. Lubricant compositions containing the new polysilahydrocarbons are disclosed. Methods of making the new polysilahydrocarbons are also disclosed.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: August 21, 2001
    Assignee: The University of Dayton
    Inventors: Grace J. Chen, Carl Edgar Snyder, Jr., Kalathil Chandy Eapen
  • Patent number: 6228285
    Abstract: A method for processing thermally intractable rigid-chain polymers into shaped structural articles is provided. The method includes dissolving a rigid-chain polymer in sulfuric acid at a concentration and temperature sufficient to form a nematic liquid crystalline solution which is then formed into a shaped article and cooled to a solid. The solution undergoes a phase transformation upon cooling from a liquid crystalline phase to a solid phase containing crystal solvates. The method allows rigid-chain polymers to be formed into fibers, bulk structural components, fiber reinforced composites and other structural materials without undergoing significant shrinkage or deformation.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: May 8, 2001
    Assignee: The University of Dayton
    Inventors: Chyi-Shan Wang, Jar-Wha Lee
  • Patent number: 6228922
    Abstract: A method is provided for forming a highly conductive metal-containing polymer fiber or sheet in which a polymer is immersed in a solution containing a metal precursor selected from organic or inorganic salts of copper, silver, aluminum, gold, iron and nickel. The metal precursor is then reduced by chemical, electrochemical, or thermal means such that conductive metal is incorporated into the polymer.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: May 8, 2001
    Assignee: The University of Dayton
    Inventors: Chyi-Shan Wang, Jar-Wha Lee, Richard A. Vaia
  • Patent number: 6190806
    Abstract: Solid composite electrolytes are provided for use in lithium batteries which exhibit moderate to high ionic conductivity at ambient temperatures and low activation energies. In one embodiment, a polymer-ceramic composite electrolyte containing poly(ethylene oxide), lithium tetrafluoroborate and titanium dioxide is provided in the form of an annealed film having a room temperature conductivity of from 10−5 S cm−1 to 10−3 S cm−1 and an activation energy of about 0.5 eV.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: February 20, 2001
    Assignee: The University of Dayton
    Inventors: Binod Kumar, Lawrence G. Scanlon, Jr.
  • Patent number: 6132905
    Abstract: Solid composite electrolytes are provided for use in lithium batteries which exhibit moderate to high ionic conductivity at ambient temperatures and low activation energies. In one embodiment, a ceramic-ceramic composite electrolyte is provided containing lithium nitride and lithium phosphate. The ceramic-ceramic composite is also preferably annealed and exhibits an activation energy of about 0.1 eV.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: October 17, 2000
    Assignee: The University of Dayton
    Inventors: Binod Kumar, Lawrence G. Scanlon, Jr.
  • Patent number: 6126719
    Abstract: The present invention is directed to an apparatus and method for recovering the group III elemental component of a group III-V material waste material. The method includes heating, under a reduced pressure, solid waste materials which contain group III-V material to cause the group III-V material to separate into a group III element and a group V element vapor; drawing off the group V element vapor; condensing the group V element vapor to produce a condensed group V element solid; and zone refining the group III element to produce a purified group III element. The apparatus is designed to carry out this method in the plant which manufactures the group III-V waste material.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: October 3, 2000
    Assignee: The University of Dayton
    Inventors: Jeffrey Allen Sturgill, Joseph Thomas Swartbaugh