Patents by Inventor Norman Johnson
Norman Johnson 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: 7842381Abstract: Electromagnetic-energy absorbing materials are combined with thermally conductive materials, such as those used for thermal management in association with electronic equipment, thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are materials and processes for combining EMI-absorbing materials with thermally conductive materials thereby improving EMI shielding effectiveness in an economically efficient manner. In one embodiment, a thermally conductive EMI absorber is prepared by combining an EMI-absorbing material (for example, ferrite particles) with a thermally conducting material (for example, ceramic particles), each suspended within an elastomeric matrix (for example, silicone). In application, a layer of thermally conductive EMI-absorbing material is applied between an electronic device or component, and a heat sink.Type: GrantFiled: July 15, 2008Date of Patent: November 30, 2010Assignee: Laird Technologies, Inc.Inventor: Richard Norman Johnson
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Patent number: 7608326Abstract: Electromagnetic-energy absorbing materials are combined with thermally conductive materials, such as those used for thermal management in association with electronic equipment, thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are materials and processes for combining EMI-absorbing materials with thermally conductive materials thereby improving EMI shielding effectiveness in an economically efficient manner. In one embodiment, a thermally conductive EMI absorber is prepared by combining an EMI-absorbing material (for example, ferrite particles) with a thermally conducting material (for example, ceramic particles), each suspended within an elastomeric matrix (for example, silicone).Type: GrantFiled: October 21, 2003Date of Patent: October 27, 2009Assignee: Laird Technologies, Inc.Inventor: Richard Norman Johnson
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Publication number: 20090163691Abstract: A method for the purification of aromatic polyether polymers prepared by a halide displacement polymerization process comprises adsorbing the catalyst with an alkali metal halide to form an adsorbent component and then removing the adsorbent component. Mixtures resulting from this method are also discussed.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Beatriz Penalver Bernabe, Thomas Guggenheim, David Bruce Hall, Norman Johnson, Juan Justino Rodriguez Ordonez, David Woodruff
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Publication number: 20090016025Abstract: Electromagnetic-energy absorbing materials are combined with thermally conductive materials, such as those used for thermal management in association with electronic equipment, thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are materials and processes for combining EMI-absorbing materials with thermally conductive materials thereby improving EMI shielding effectiveness in an economically efficient manner. In one embodiment, a thermally conductive EMI absorber is prepared by combining an EMI-absorbing material (for example, ferrite particles) with a thermally conducting material (for example, ceramic particles), each suspended within an elastomeric matrix (for example, silicone). In application, a layer of thermally conductive EMI-absorbing material is applied between an electronic device or component, and a heat sink.Type: ApplicationFiled: July 15, 2008Publication date: January 15, 2009Applicant: Laird Technologies, Inc.Inventor: Richard Norman Johnson
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Publication number: 20080307764Abstract: Systems, including apparatus and methods, for harvesting a product with a mobile harvester so as to minimize the amount of product lost during harvesting. The disclosed systems include an array of catcher plates designed to surround a plant to be harvested, in a manner that minimizes the possibility of harvested product dropping through the plates to the ground and thus being lost. These systems may be useful for harvesting a wide variety of products that grow on plants such as trees or bushes, including without limitation berries, fruit, and coffee beans.Type: ApplicationFiled: June 13, 2007Publication date: December 18, 2008Applicant: LITTAU HARVESTER, INC.Inventors: Willard Norman Johnson, Daniel Frederick Setniker, Frank Steven Brown
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Patent number: 7338547Abstract: Electro-magnetic-energy absorbing materials are used to treat air filters, such as those used in association with electronic equipment thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are processes and materials for applying EMI-absorbing materials to air filters thereby improving EMI-shielding effectiveness in an economically efficient manner. In one embodiment, an absorptive solution is prepared using an absorptive material and a binding agent. A heavy coating of absorbing solution applied to an air filter substrate, for example by dipping or spraying. Excess absorbing material is subsequently removed and the absorbing material cured, such that the passage of air through the filter remains substantially unimpeded. The resulting absorptive air filter is then optionally treated with a flame retardant to meet a predetermined safety standard.Type: GrantFiled: October 2, 2003Date of Patent: March 4, 2008Assignee: Laird Technologies, Inc.Inventors: Richard Norman Johnson, Phillip van Haaster
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Publication number: 20070138359Abstract: A compact and easily transportable apparatus for hoisting objects capable of using only a tree as support.Type: ApplicationFiled: December 21, 2005Publication date: June 21, 2007Inventor: Norman Johnson
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Patent number: 7218973Abstract: The invention includes an adaptive control system used to control a plant. The adaptive control system includes a hedge unit that receives at least one control signal and a plant state signal. The hedge unit generates a hedge signal based on the control signal, the plant state signal, and a hedge model including a first model having one or more characteristics to which the adaptive control system is not to adapt, and a second model not having the characteristic(s) to which the adaptive control system is not to adapt. The hedge signal is used in the adaptive control system to remove the effect of the characteristic from a signal supplied to an adaptation law unit of the adaptive control system so that the adaptive control system does not adapt to the characteristic in controlling the plant.Type: GrantFiled: June 23, 2003Date of Patent: May 15, 2007Assignee: Georgia Tech Research CorporationInventors: Eric Norman Johnson, Anthony J. Calise
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Patent number: 7210323Abstract: A forming apparatus and method for minimizing wrinkling in the forming of a three-dimensional component from a two-dimensional blank. The forming apparatus includes vertically opposed sets of tools or binders. A first tool or binder apparatus has first and second sets of opposed sides having contoured binder surfaces. A second tool or binder apparatus is mounted in vertically opposed relation to the first binder apparatus, and includes first and second sets of opposed tool or binder segments that have contoured binder surfaces thereon that are complementary in shape to the respective binder surfaces of the first and second sets of opposed sides of the first binder apparatus. One of the first and second sets of opposed binder segments of the second binder apparatus have substantially similar contours and the other have different contours. One of the first and second sets of opposed binder segments of the second binder apparatus is elevated and movable with respect to the other.Type: GrantFiled: December 16, 2003Date of Patent: May 1, 2007Assignee: General Motors CorporationInventors: Gary A. Kruger, Mark G. Konopnicki, Chongmin Kim, John Norman Johnson
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Patent number: 7204119Abstract: A press and tooling apparatus for forming a preheated blank includes a heated upper tool and an opposing heated lower tool mounted within the press for relative closing movement to press the preheated blank there between. A binder ring assembly surrounds the lower tool and is mounted on the press for movement relative to the lower tool so at to bind the preheated blank to the upper tool in air tight sealing relationship in readiness for closure of the tools and application of pressurized gas to force the blank into contact with the upper tools. The binder ring assembly includes an upper ring that is heated so as to prevent the cooling of the preheated blank, and a lower ring that supports the upper ring and is fixedly connected to the upper ring by spaced apart connectors so as to minimize the heat transfer path from the heated upper ring to the lower ring.Type: GrantFiled: June 10, 2005Date of Patent: April 17, 2007Assignee: GM Global Technology Operations, Inc.Inventors: Gary A. Kruger, John Norman Johnson, Richard H. Hammar, Chongmin Kim
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Patent number: 7135643Abstract: Lossy materials can be used to suppress EMI transmission. Disclosed are methods for applying lossy materials to EMI shielded enclosures to improve EMI shielding effectiveness and the EMI shielded enclosures so produced. In some embodiments, the EMI shielded enclosure includes a printed-circuit board mountable device. In one embodiment, lossy material can be applied to the interior of an EMI shielded enclosure using an adhesive. In another embodiment, lossy materials can be applied to the exterior of the EMI enclosure to suppress EMI incident upon the EMI shielded enclosure, thereby reducing the susceptibility of electronics contained within the EMI shielded enclosure. In yet another embodiment, lossy materials can be applied to both the interior and exterior of the EMI enclosure.Type: GrantFiled: December 13, 2002Date of Patent: November 14, 2006Assignee: Laird Technologies, Inc.Inventors: Philip van Haaster, Edward Nakauchi, Richard Norman Johnson
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Publication number: 20060173158Abstract: Polyether polymers, such as polyetherimides, are prepared by the reaction of a dihydroxy-substituted aromatic hydrocarbon alkali metal salt, such as bisphenol A disodium salt, with a bis(N-(chlorophthalimido))aromatic compound, such as 1,3- and/or 1,4-bis(N-(4-chlorophthalimido))benzene, in a solvent such as o-dichlorobenzene and in the presence of a phase transfer catalyst such as a hexaalkylguanidinium chloride. Several embodiments may be employed to improve the method. They comprise employing substantially dry reagents, employing a high solids level in solvent, beginning with an excess of bis(N-(chlorophthalimido))-aromatic compound and incrementally adding alkali metal salt, employing alkali metal salt of small particle size, and using reagents of high purity.Type: ApplicationFiled: February 28, 2006Publication date: August 3, 2006Applicant: General Electric CompanyInventors: Daniel Brunelle, Havva Acar, Farid Khouri, Thomas Guggenheim, David Woodruff, Norman Johnson
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Publication number: 20060167210Abstract: A method of making a polyether polymer comprises reacting a salt of a dihydroxy-substituted aromatic hydrocarbon with a substituted aromatic compound of formula (I) Z(A1-X1)2 ??(I) in the presence of a catalyst to form an intermediate polymer having endgroups, wherein the molar ratio of the salt of a dihydroxy-substituted aromatic hydrocarbon to the substituted aromatic compound is less than 1, Z is an activating radical, A1 is an aromatic radical and X1 is fluoro, chloro, bromo or nitro; determining the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon needed to form a final polyether polymer with a predetermined molecular weight and adding the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon to the intermediate polymer.Type: ApplicationFiled: January 27, 2005Publication date: July 27, 2006Inventors: Thomas Guggenheim, Norman Johnson, Ganesh Kailasam, Pradeep Nadkarni, David Woodruff
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Publication number: 20060135741Abstract: Bis(halophthalimides) are prepared in mixture in an organic liquid such as ortho-dichlorobenzene or anisole, by a reaction at a temperatire of at least 150° C. between at least one diamine compound and at least one halophthalic anhydride in the presence of imidization catalyst. The reaction mixture is maintained at about 15% by weight solids content and rich in the halophthalic anhydride by constantly monitoring the reaction mixture using analytical methods such as high performance liquid chromatography. The product mixture may be directly employed in the direct preparation of polyetherimides, and similar slurries may be employed to prepare other polyether polymers.Type: ApplicationFiled: December 22, 2004Publication date: June 22, 2006Inventors: John Gui, Farid Khouri, Norman Johnson, Thomas Guggenheim, David Woodruff, James Silva
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Publication number: 20060089487Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.Type: ApplicationFiled: December 8, 2005Publication date: April 27, 2006Inventors: Norberto Silvi, Mark Giammattei, Jan Keulen, David Woodruff, Paul Wilson, Paul Buckley, Norman Johnson, Narayan Ramesh
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Publication number: 20050234218Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.Type: ApplicationFiled: June 3, 2005Publication date: October 20, 2005Inventors: Norberto Silvi, Mark Giammattei, Jan Keulen, David Woodruff, Paul Wilson, Paul Buckley, Norman Johnson
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Publication number: 20050234219Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.Type: ApplicationFiled: June 6, 2005Publication date: October 20, 2005Inventors: Norberto Silvi, Mark Giammattei, Jan Keulen, David Woodruff, Paul Wilson, Paul Buckley, Norman Johnson
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Patent number: 6880377Abstract: A method is disclosed for forming sheet metal articles, such as automotive body panels, having significant curvatures in front-to-back and side-to-side directions. Opposing, complementary, preforming and final shape forming tools are used in a single press. A sheet of superplastically or quick plastically formable sheet metal alloy, heated to a forming temperature, is first stretched against the preform tool using pressurized gas to form a preform that has experienced most of the metal stretching required for the final part shape. The preform is removed from the preform tool and formed against the opposing tool with pressurized gas to obtain the final sheet metal part shape.Type: GrantFiled: October 17, 2002Date of Patent: April 19, 2005Assignee: General Motors CorporationInventors: Chongmin Kim, Gary A. Kruger, Mark G. Konopnicki, John Norman Johnson, James Gregory Schroth, Michelle R. Goff
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Publication number: 20050049439Abstract: Disclosed is a method for preparing an alkali metal salt of a hydroxy-substituted hydrocarbon which comprises the steps of (i) contacting in solvent media at least one hydroxy-substituted hydrocarbon with a base comprising an alkali metal cation; and (ii) devolatilizing the solvent media comprising alkali metal salt by adding or spraying the solvent media into a substantially water-immiscible organic solvent, said solvent being at a temperature greater than the boiling point of solvent media at the prevailing pressure. In one embodiment the solvent media comprises water, and optionally at least one water-soluble protic organic solvent.Type: ApplicationFiled: August 25, 2003Publication date: March 3, 2005Inventors: Thomas Guggenheim, Daniel Brunelle, David Woodruff, Lee Bergman, Norman Johnson, Matthew Littlejohn, Farid Khouri
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Publication number: 20050049393Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.Type: ApplicationFiled: August 26, 2003Publication date: March 3, 2005Inventors: Norberto Silvi, Mark Giammattei, Jan Keulen, David Woodruff, Paul Wilson, Paul Buckley, Norman Johnson