Patents by Inventor John W. Halloran
John W. Halloran 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).
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Patent number: 9403322Abstract: Systems and methods for fabricating three-dimensional objects are disclosed. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.Type: GrantFiled: December 18, 2013Date of Patent: August 2, 2016Assignees: GEORGIA TECH RESEARCH CORPORATION, THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: Suman Das, John W. Halloran
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Publication number: 20140103581Abstract: Systems and methods for fabricating three-dimensional objects are disclosed. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.Type: ApplicationFiled: December 18, 2013Publication date: April 17, 2014Applicants: The Regents of the University of Michigan, Georgia Tech Research CorporationInventors: Suman Das, John W. Halloran
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Patent number: 8636496Abstract: Systems and methods for fabricating three-dimensional objects. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.Type: GrantFiled: May 5, 2009Date of Patent: January 28, 2014Assignees: Georgia Tech Research Corporation, The Regents of the University of MichiganInventors: Suman Das, John W. Halloran
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Patent number: 8288055Abstract: A fuel cell stack configured to input raw fuel from a fuel source to produce electrical energy includes a fuel cell comprising an anode, an electrolyte, and a cathode. The anode defines an anode chamber, and a hydrogen separation member is disposed within the anode chamber. The hydrogen separation member has a first side and a second side. The first side of the hydrogen separation member defines a raw fuel chamber. The hydrogen separation member transfer hydrogen between the first side and the second side to provide hydrogen fuel to the anode of the fuel cell, while inhibiting the transportation of gas molecules between the first side and the second side.Type: GrantFiled: January 20, 2009Date of Patent: October 16, 2012Assignee: Adaptive Materials, Inc.Inventors: John W. Halloran, Timothy LaBreche, Shaowu Zha, Aaron T. Crumm
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Publication number: 20100183937Abstract: A fuel cell stack configured to input raw fuel from a fuel source to produce electrical energy includes a fuel cell comprising an anode, an electrolyte, and a cathode. The anode defines an anode chamber, and a hydrogen separation member is disposed within the anode chamber. The hydrogen separation member has a first side and a second side. The first side of the hydrogen separation member defines a raw fuel chamber. The hydrogen separation member transfer hydrogen between the first side and the second side to provide hydrogen fuel to the anode of the fuel cell, while inhibiting the transportation of gas molecules between the first side and the second side.Type: ApplicationFiled: January 20, 2009Publication date: July 22, 2010Inventors: John W. Halloran, Timothy LaBreche, Shaowu Zha, Aaron T. Crumm
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Publication number: 20100003619Abstract: Systems and methods for fabricating three-dimensional objects. The system includes an optical imaging system providing a light source; a photosensitive medium adapted to change states upon exposure to a portion of the light source from the optical imaging system; a control system for controlling movement of the optical imaging system, wherein the optical imaging system moves continuously above the photosensitive medium. The method includes moving a maskless optical imaging system providing the light beam in a continuous sequence; presenting the light beam on a portion of the photosensitive medium; lowering a plate upon which the photosensitive medium resides; and applying a new layer of the photosensitive medium.Type: ApplicationFiled: May 5, 2009Publication date: January 7, 2010Inventors: Suman Das, John W. Halloran
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Patent number: 6749799Abstract: A method for preparation of a solid state electrochemical device having a cathode, and anode and an electrolyte positioned between the cathode and the anode is disclosed, comprising the steps of forming a controlled geometry feedrod having a cross sectional area, having at least a first extrusion compound and a second extrusion compound, and co-extruding the controlled geometry feedrod through a reduction die at least once to achieve a desired reduction in cross sectional area. Such microfabrication by thermoplastic co-extrusion enhances production of complex and multiphase electrodes and electrolytes.Type: GrantFiled: February 12, 2002Date of Patent: June 15, 2004Assignee: Adaptive Materials, Inc.Inventors: Aaron T. Crumm, John W. Halloran
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Publication number: 20030151156Abstract: A method for preparation of a solid state electrochemical device having a cathode, and anode and an electrolyte positioned between the cathode and the anode is disclosed, comprising the steps of forming a controlled geometry feedrod having a cross sectional area, having at least a first extrusion compound and a second extrusion compound, and co-extruding the controlled geometry feed rod through a reduction die at least once to achieve a desired reduction in cross sectional area. Such microfabrication by thermoplastic co-extrusion enhances production of complex and multiphase electrodes and electrolytes.Type: ApplicationFiled: February 12, 2002Publication date: August 14, 2003Inventors: Aaron T. Crumm, John W. Halloran
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Patent number: 6117612Abstract: Photocurable ceramic resins having solids loadings in excess of 40 volume percent and a viscosity of less than 3000 mPa.multidot.s are suitable for multi-layer fabrication of green ceramic parts by stereolithography and similar techniques. The green ceramic parts, which may be of traditional ceramic materials, sinterable metals, or combinations thereof, exhibit low shrinkage upon firing or sintering, and may be used for such applications as rapid prototyping, biocompatible ceramic parts, ceramic cores for investment casting, ceramic molds for metal casting, and the like.Type: GrantFiled: October 8, 1997Date of Patent: September 12, 2000Assignee: Regents of the University of MichiganInventors: John W. Halloran, Michelle Griffith, Tien-Min Chu
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Patent number: 5645781Abstract: A method for the preparation of a fibrous monolithic ceramic which exhibits non-brittle fracture characteristics from green monofilament ceramic fibers having a controlled texture. This method includes the steps of: (a) forming a first ceramic-laden composition includes a thermoplastic polymer and at least about 40 vol. % of a ceramic particulate into a substantially cylindrical core, (b) applying a layer of a second ceramic-laden composition includes a thermoplastic polymer and at least about 40 vol.Type: GrantFiled: September 21, 1994Date of Patent: July 8, 1997Assignee: The Regents of the University of MichiganInventors: Dragan Popovic', John W. Halloran, Gregory E. Hilmas, Guy Allen Brady, Scott Somers, Andrew Barda, Gregory Zywicki
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Patent number: 5055436Abstract: An improved process for preparing superconducting ceramic powder includes calcining superconducting precursor compounds in an atmosphere having a controlled amount of oxygen, generally not more than that found in air, the remainder of the atmosphere composed of a gas or mixture of gases inert with respect to the ceramic. A preferred process includes forming the precursor compounds into a slurry, granulating the slurry, drying the granules (a binder can be added to the slurry to promote green strength), and calcining in the controlled atmosphere to provide the desired HTSC (high temperature superconductor) composition.Type: GrantFiled: August 19, 1988Date of Patent: October 8, 1991Assignee: CPS Superconductor Corp.Inventors: Lori J. Klemptner, James D. Hodge, John W. Halloran
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Patent number: 4990490Abstract: A coating composition for ceramic fibers is provided which includes metal particles and a vehicle. The coating can be applied to a green ceramic or a sintered ceramic, and is co-sintered or sintered therewith. Such coatings are useful for coating high temperature superconducting ceramic fibers and can be co-sintered therewith. The coated superconducting fibers, in which case the coating is porous to allow for annealing to adjust the oxygen stoichiometry, can then be sandwiched between metal cladding layers to provide a multifilamentary electrical conductor including superconducting active components. The coating is useful for such conductors because it compatibilizes the ceramic fiber with metal components, such as a solder, as well as protecting the ceramic from possibly degrading reactions. The compositions are also generally advantageous in compatibilizing ceramic fibers with a metal matrix.Type: GrantFiled: June 3, 1988Date of Patent: February 5, 1991Assignee: CPS Superconductor Corp.Inventors: Viren M. Pathare, John W. Halloran
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Patent number: 4978643Abstract: A solution containing polymerizable monomers and volatile solvents can be used to disperse ceramic particles along with ceramic whiskers and remain pourable even with high solids. Using this dispersion, a high solids ceramic article can be molded, polymerized in situ and fired with a good binder burnout.Type: GrantFiled: September 23, 1988Date of Patent: December 18, 1990Assignee: Ceramics Process Systems CorporationInventors: Krishna Venkataswamy, Richard Waack, Bruce E. Novich, John W. Halloran
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Patent number: 4882304Abstract: A highly loaded, uniform ceramic composite can be made by first preparing a highly loaded suspension. Due to the particle-particle interactions of a highly concentrated system, virtually any dopant can be added, including other suspensions, fibers, and whiskers. The process is particularly useful for making composites of materials which coagulate when mixed at low concentration.Type: GrantFiled: April 9, 1987Date of Patent: November 21, 1989Assignee: Ceramics Process Systems Corp.Inventors: Bruce E. Novich, John W. Halloran