GrafTech International Holdings Inc. Patent applications |
Patent application number | Title | Published |
20160096736 | TRANSPARENT CONDUCTIVE ARTICLE - A transparent conductive article which includes one of more graphene sheets, at least one of the sheets having a sheet resistance of less than 100 Ω/□. The transparent conductive article includes no more than ten graphene sheets. The transparent conductive article can have a transmission of at least 90%. The one or more sheets can have a transmission of at least 90%. A method of making a transparent conductive sheet includes heat treating a chemical vapor deposition (CVD) grown graphene sheet, the sheet having a width dimension of at least 1 cm, in a non-oxidizing environment to a temperature of at least 2400° C. for a sufficient period of time to have a sheet resistance of less than 100 Ω/□ and a transmittance of at least 90%. Prior to heat treating, the sheet is disposed on a suspension media, such as flexible graphite, having a chemical and thermal stability such that the suspension media functionally survives the heat treating step. | 04-07-2016 |
20160029481 | DISPLAY DEVICE WITH FLEXIBLE CIRCUIT BOARD HAVING GRAPHITE SUBSTRATE - A display device is provided. The display device includes a light engine having light emitting components mounted to a flexible circuit board having a flexible graphite substrate. The flexible circuit board includes a dielectric layer formed on the surface of the flexible graphite substrate and an electrically conductive layer formed on the surface of the dielectric. The high in-plane thermal conductivity graphite substrate provides enhanced heat transfer capability to effectively move of heat away from the light emitting components for improved cooling of the heat generated by the light emitting component and surrounding devices. | 01-28-2016 |
20160029480 | FLEXIBLE CIRCUIT BOARD WITH GRAPHITE SUBSTRATE AND CIRCUIT ARRANGEMENTS USING SAME - A flexible circuit board having a flexible graphite substrate is provided. The flexible circuit board includes a dielectric layer formed on the surface of the flexible graphite substrate and an electrically conductive layer formed on the surface of the dielectric. Electronic components are mounted to the flexible circuit board to form a circuit arrangement. A thermally conductive conduit can be disposed in thermal and physical contact with a surface of the electronic component and the surface of the flexible graphite substrate to. The high in-plane thermal conductivity graphite substrate provides enhanced heat transfer capability to effectively move of heat away from the electronic components for improved cooling of the heat generating electronic component and surrounding devices. | 01-28-2016 |
20160025280 | LED LIGHT ARRANGEMENT WITH FLEXIBLE CIRCUIT BOARD HAVING GRAPHITE SUBSTRATE - An LED light arrangement is provided. The light arrangement includes LED light emitting components mounted to a flexible circuit board having a flexible graphite substrate. The flexible circuit board includes a dielectric layer formed an the surface of the flexible graphite substrate and an electrically conductive layer formed on the surface of the dielectric. The high in-plane thermal conductivity graphite substrate provides enhanced heat transfer capability to effectively move of heat away from the electronic components for improved cooling of the heat generating light emitting component and surrounding devices. | 01-28-2016 |
20150316813 | OPTIMIZED FRAME SYSTEM FOR A LIQUID CRYSTAL DISPLAY DEVICE - An image display device comprising an image display panel, a frame system including a framework operatively engaging the image display panel and a plurality of electronic components operatively engaging the framework, heat dispersion material operatively engaging the framework and in operative thermal contact with the electronic components, where the frame system exhibits a support factor of less than about 150 mm-W/m° K. | 11-05-2015 |
20150313043 | DISPLAY DEVICE HAVING IMPROVED PROPERTIES - An image display device having improved properties, comprising an image display panel, heat dispersion material positioned proximate to the image display panel, an open frame positioned proximate to the heat dispersion material opposite the image display panel, and a plurality of electronic components engaging the open frame, the image display device exhibits a support factor of less than about 375 mm-W/m° K. | 10-29-2015 |
20150313038 | OPTIMIZED FRAME SYSTEM FOR A DISPLAY DEVICE - An image display device comprising an image display panel, heat dispersion material positioned proximate to the image display panel, a frame system including a framework positioned proximate to the heat dispersion material opposite the image display panel, and a plurality of electronic components engaging the framework, where the image display device exhibits a support factor of less than about 150 mm-W/m° K. The framework can be adhesively bonded to the heat dispersion material. The framework can include a height and a width wherein the heat dispersion material substantially spans the height and the width. Additionally, a first cross support can span the framework and a plurality of second electronic components can engage the first cross support. Additionally a second cross support can span the framework wherein at least one of the second electronic components engages the second cross support. | 10-29-2015 |
20150230296 | Graphite Electrodes - A graphite electrode exhibits oxidation resistance by modifying the outer radial surface characteristics. The outer radial surface may be modified by providing a textured portion which improves water flow while minimizing water absorbtion. Alternately, a layer of flexible graphite or plurality of particles of exfoliated graphite may be disposed on the outer radial surface of the electrode body. | 08-13-2015 |
20140248515 | Battery Pack Assembly - A battery pack includes a plurality of cell assemblies each of which include one or more prismatic batteries. A frame has legs sized and configured to be positioned around the prismatic batteries. At least one leg includes a rear face, curved outer edge and a side face. A thermal transfer sheet is made from a sheet of a compressed mass of exfoliated graphite particles. Each thermal transfer sheet is positioned to contact the major surface of the at least one prismatic battery and is bent over the curved outer edge. At least a portion of each thermal transfer sheet is secured between a heat sink and the side face. | 09-04-2014 |
20140154549 | Battery Pack Assembly - A battery pack thermal management assembly draws heat from prismatic batteries having opposed major surfaces and arranged in a stacked configuration inside a housing. The thermal management assembly includes a plurality of thermal transfer sheets made from sheets of a compressed mass of exfoliated graphite particles. Each thermal transfer sheet is positioned to contact the major surface of at least one of the prismatic batteries. A cover plate has a top face and a bottom face and includes a plurality of apertures through which the plurality of thermal transfer sheets extend. The apertures include at least one curved sidewall and the thermal transfer sheets are bent over the curved sidewall. At least a portion of each of the thermal transfer sheets is secured between a heat sink and the top face. | 06-05-2014 |
20140147363 | Graphite Article - One use for irradiated graphite after remediation processing is to recycle it into a new graphite artifact. Examples of such artifacts include an electrode to be used for vitrification of radionucleotides, graphite or carbon articles for uranium processing, a moderator for a HTGR, in particularly a Gen IV HTGR, other types of graphite products for nuclear facilities, charcoal filters, silicon carbide applications, etc. Such graphite artifacts can be formed with up to 20 pph of carbon black, the carbon black is formed from vitrified irradiated graphite. Optionally the graphite artifact may be formed from up to 75 pph of pitch. | 05-29-2014 |
20140109804 | Thermal Insulation Assembly - A furnace insulation assembly includes a main body having a generally U-shaped cross-section. The main body includes a pair of side walls. A pair of end plates are secured to opposed ends of the main body. The end plates and the main body form an interior chamber. The end plates and side walls are made of a thermal insulation material formed from carbon fibers, said carbon fibers in each end plate and side wall are oriented against-grain direction points inwardly toward the interior chamber. | 04-24-2014 |
20140105240 | Slag Freeze-Lining for Electronic Arc Furnace - An improved method of operating an arc furnace is provided. The sidewall of the furnace includes a refractory lining. A charge of scrap metal is added to the furnace. The charge is melted and a slag layer is formed on the top of the melting charge. The furnace is tapped at the bottom to remove a portion of the melted charge. After tapping the furnace, the slag is splashed onto the sidewall to thereby coat the sidewall with a frozen slag layer. | 04-17-2014 |
20130294096 | Thermal Bridge for LED Luminaires - A luminaire includes two housing halves, movable relative to each other between an open and closed configuration. The bottom housing half includes disposed therein a substrate which itself carries at least one LED which transmits light through a window in the bottom housing half. A thermal bridge made of at least one layer of anisotropic thermally conductive graphite is in thermal contact with the substrate and the top housing half when the housing is in the closed configuration, but its disengaged from either the substrate or top housing half when the housing is in the open configuration. | 11-07-2013 |
20130285529 | Thermal Solution for LED Bulbs - A light bulb ( | 10-31-2013 |
20130279534 | Graphite Electrodes - A graphite electrode exhibits oxidation resistance by modifying the outer radial surface characteristics. The outer radial surface may be modified by providing a textured portion which improves water flow while minimizing water absorbtion. Alternately, a layer of flexible graphite or plurality of particles of exfoliated graphite may be disposed on the outer radial surface of the electrode body. | 10-24-2013 |
20130242573 | LED Light Fixture With Improved Thermal Management - A light fixture ( | 09-19-2013 |
20130228493 | Falling Film Reactor for Light Tar Oxidation - A method of processing light fraction tar includes pre-heating the light fraction tar before directing it through a reactor. The reactor has a top and a bottom and a surface spanning between said top and said bottom. A film of the light fraction tar flows down the surface under the force of gravity and with heated gas blowing thereon. The portion of the film that reaches the bottom of the reactor has improved properties making it more widely useful for carbon products. | 09-05-2013 |
20130216887 | Composite Heat Spreader and Battery Module Incorporating the Same - A composite heat spreader includes a first flexible graphite layer, a second flexible graphite layer, and a gas evolving layer positioned between the first flexible graphite layer and the second flexible graphite layer. The gas evolving layer is temperature sensitive and when a threshold temperature is reached, the thermal conductivity of the gas evolving layer is reduced by at least factor of five. | 08-22-2013 |
20130213630 | Composite Heat Spreader - A composite heat spreader ( | 08-22-2013 |
20130183566 | Thermal Management Structures for Battery Packs - A battery pack includes a plurality of cylindrical battery cells. Damage caused by thermal energy generated in the battery pack is minimized by a one or more graphite sheets in contact with a portion of each cylindrical battery cell. | 07-18-2013 |
20130171493 | Battery Heat Exchanger - A heat exchanger assembly includes a fluid transfer layer and a first external layer. The fluid transfer layer is made from an elastomeric material and the first external layer includes flexible graphite. The fluid transfer layer includes at least one channel and is configured to form a passage for receiving a thermal transfer fluid between the channel and a portion of the first external layer. | 07-04-2013 |
20130171453 | Graphite Electrodes - A carbon article having a first zone and a second zone wherein in the first zone formed from a first mix design and the second zone formed from a second mix design and the first and second mix designs have at least one difference selected from the group of differences of a presence of a certain material, a concentration of a certain material, the size of the a certain material and combinations thereof. | 07-04-2013 |
20130121365 | Electrode Consumption Monitoring System - A method and system automatically determines when an electrode add event occurs in an electric arc furnace having a plurality of electrode columns, each carried by an electrode positioning system. Data is received correlating to the harmonic distortion of the electrical current output to the plurality of electrode columns. Data is also received correlating to control pressures in the electrode positioning systems. Steady state control pressure data is captured when the harmonic distortion data indicates a steady state condition. An electrode add event is thereafter determined when a pressure spike is identified in the steady state control pressure data. | 05-16-2013 |
20130115506 | Thermal Solution for Prismatic Lithium Ion Battery Pack - A lithium ion battery pack includes a plurality of prismatic lithium polymer cells and one or more graphite heat spreaders. Each spreader has at least two major surfaces and is made of one of a sheet of a compressed mass of exfoliated graphite particles, a graphitized polyimide sheet, or combinations thereof. | 05-09-2013 |
20130111730 | Graphite Crucible for Silicone Crystal Production and Method of Ingot Removal - A graphite crucible for processing silicon includes a bottom wall including a bottom wall interior facing surface. A plurality of side walls extend upwardly from the bottom wall, each side wall including a side wall interior facing surface. A contact point is provided on the side wall to prevent upward movement of the crucible during ingot removal. The side walls have a coefficient of thermal expansion perpendicular to the solidification direction that is less than 95% of the coefficient of thermal expansion of the silicon processed therein. Also, the side walls and the bottom wall have a thru-plane thermal conductivity from about 90 to about 160 W/m·K at room temperature. | 05-09-2013 |
20130099013 | Flexible Graphite Flooring Heat Spreader - A floor heating system includes a flooring substrate having a heating or cooling element in heat transfer relationship therewith. A heat spreader is in heat transfer relationship with the flooring substrate. The heat spreader includes a layer of flexible graphite material. A floor covering overlies the layer of flexible graphite material. Temperature variations across an exposed surface of the floor covering are reduced by the presence of the flexible graphite heat spreader, thus providing an improved and more uniform heating to the floor and to the room with which the floor is associated. | 04-25-2013 |
20120234525 | HEAT SPREADER FOR PLASMA DISPLAY PANEL - The invention presented is a method for applying heat spreaders to a plurality of plasma display panels, including (a) providing a plurality of heat spreader composites, each of which comprises a heat spreader material having an adhesive thereon and a release material positioned such that the adhesive is sandwiched between the heat spreader material and the release material; (b) removing the release material from a plurality of the composites; and (c) applying at least one of the composites to each of the plurality of plasma display panels each such that the adhesive adheres the heat spreader material to the plasma display panel. | 09-20-2012 |
20120113595 | Method of Making an Electronic Device - An electronic device includes an electronic component with a mating surface. A thermal interface sheet is attached to the mating surface. A substrate carries the electronic device and includes a face. The electronic component is secured to the substrate with the thermal interface sheet positioned between the mating surface and the face. The mating surface is relatively less flat than the face and the mating surface is relatively smoother than the face. | 05-10-2012 |
20120040141 | Dimensionally Stable, Leak-Free Graphite Substrate - A method for preparing resin-impregnated graphite articles, including providing a sheet of compressed particles of exfoliated graphite having two major surfaces; impregnating the sheet with a first resin system to form a resin-impregnated sheet; surface treating the resin-impregnated sheet to form at least one structure on at least one of the major surfaces of the sheet to form a surface treated sheet; and treating the sheet with a second resin system. | 02-16-2012 |
20110280275 | Reduced Puffing Needle Coke From Coal Tar Distillate - A reduced puffing needle coke is formed, which includes a reduced nitrogen content within the coke so that the coke particles do not experience as much puffing during the formation of graphitized carbon articles produced from such coke upon heating to graphitization temperatures. | 11-17-2011 |
20110280274 | Reduced Puffing Needle Coke From Decant Oil - A reduced puffing needle coke is formed from decant oil, which includes a lesser amount of nitrogen within the coke so that carbon articles produced from such coke experience minimal expansion upon heating to graphitization temperatures. | 11-17-2011 |
20110274136 | Reduced Puffing Needle Coke From Coal Tar - A reduced puffing needle coke is formed, which includes a lesser amount of nitrogen within the coke so that carbon articles produced from such coke experience minimal expansion upon heating to graphitization temperatures. | 11-10-2011 |
20110027654 | Low Conductivity Carbon Foam For A Battery - A carbon foam battery useful for electrical applications is disclosed which includes a relatively low conductivity low density high porosity carbon foam. | 02-03-2011 |
20090032227 | Flexible Graphite Thermal Management Devices - The invention provides to thermal management devices constructed from flexible graphite. In one embodiment, the thermal management device includes a wick structure inside a shell. In certain preferred embodiments, the wick structure is composed of a mass of expanded graphite. In a another embodiment, the shell of the device includes flexible graphite and an optional wick structure. In certain preferred embodiments, the flexible graphite shell is fluid impermeable. The invention further includes methods of making the aforementioned thermal management devices. | 02-05-2009 |