Patents by Inventor Thomas C. Pederson
Thomas C. Pederson 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: 9011977Abstract: Microencapsulated chemical(s), as water-soluble solid particles, are embedded in at least one the paint layers on the surface of a magnesium article used in an automobile. If the protective paint film is scratched or otherwise mechanically disturbed to expose the surface of the magnesium article the capsules will be ruptured. This will expose the encapsulated chemical(s) to ambient water enabling them to dissolve and form an aqueous solution capable of reacting with the exposed magnesium to form a protective passivating layer on the exposed magnesium to resist corrosion. In a second embodiment the encapsulated chemicals include a deliquescing compound for extraction of moisture from the atmosphere sufficient to induce dissolution of the passivating layer-forming chemical(s) and trigger the formation of the passivating layer in the absence of ambient water.Type: GrantFiled: September 11, 2009Date of Patent: April 21, 2015Assignee: GM Global Technology Operations LLCInventors: Anil K. Sachdev, Thomas C. Pederson, Mark W. Verbrugge
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Patent number: 8951654Abstract: One embodiment includes a rechargeable charge storage device including a microcapsule disposed within said rechargeable charge storage device; and a thermal retardant chemical species contained within said microcapsule, wherein said microcapsule is adapted to release said chemical species upon being exposed to a triggering event either prior to or during an unstable rise in temperature of said charge storage device.Type: GrantFiled: December 2, 2011Date of Patent: February 10, 2015Assignee: GM Global Technology Operations LLCInventors: Anil K. Sachdev, Mark W. Verbrugge, Thomas C. Pederson, William R. Rodgers, Hamid G. Kia, Howard William Cox, Paula D. Fasulo, Ingrid A. Rousseau, Tao Xie
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Patent number: 8783214Abstract: An oil filter and oil-additive dispensing device comprising an oil filter and oil additive replenishment system further comprising: a full-flow oil filter; a by-pass oil filter; an oil additive dispensing system; and an on-vehicle controller to dispense additive as required, track additive consumption and signal the need for a replacement system is described. Also a method of using such oil filter and oil-additive dispensing device to extend the useful life of lubricating oil in a vehicle engine is described.Type: GrantFiled: August 21, 2009Date of Patent: July 22, 2014Assignee: GM Global Technology Operations LLCInventors: Anil K. Sachdev, Edward P. Becker, Thomas A. Perry, Emerson J. Adams, Thomas C. Pederson
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Patent number: 8540009Abstract: An exemplary method for forming a sand core includes forming a core insert; forming a sand core precursor around the core insert; and creating at least one passage within the sand core precursor by removing or otherwise transforming a portion of the core insert, wherein the at least one passage includes at least one exit point. The sand core may then be utilized in a casting mold assembly to form a cast part.Type: GrantFiled: February 23, 2009Date of Patent: September 24, 2013Assignee: GM Global Technology Operations LLCInventors: Michael J. Walker, Thomas C. Pederson, Jason R. Traub, Anil K. Sachdev
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Publication number: 20130146009Abstract: An engine lubricating system for an internal combustion engine. The system comprises a vehicle engine; a circulation system for providing a continuing flow of lubricant to the vehicle engine and engine components; and a lubricant disposed within the circulation system. The lubricant comprises a base oil and at least one microencapsulated oil additive. The microencapsulated oil additive is selectively released into the lubricant based one or more localized event. The localized event may include a predetermined temperature change, a predetermined pH change, a localized high friction contact, and combinations thereof.Type: ApplicationFiled: December 7, 2011Publication date: June 13, 2013Applicant: GM Global Technology Operations LLCInventors: Thomas C. Pederson, Anil K. Sachdev, Eric W. Schneider
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Publication number: 20130143076Abstract: One embodiment includes a rechargeable charge storage device including a microcapsule disposed within said rechargeable charge storage device; and a thermal retardant chemical species contained within said microcapsule, wherein said microcapsule is adapted to release said chemical species upon being exposed to a triggering event either prior to or during an unstable rise in temperature of said charge storage device.Type: ApplicationFiled: December 2, 2011Publication date: June 6, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Anil K. Sachdev, Mark W. Verbrugge, Thomas C. Pederson, William R. Rodgers, Hamid G. Kia, Howard William Cox, Paula D. Fasulo, Ingrid A. Rousseau, Tao Xie
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Patent number: 8101036Abstract: In an illustrative embodiment, two panels of different materials may be bonded with a structural adhesive composition comprising microcapsules containing corrosion inhibiting materials for protecting the panels from corrosion. For example, a steel vehicle door outer panel may be bonded to an aluminum alloy or magnesium alloy inner panel using an epoxy adhesive. Dispersed within the uncured adhesive are an abundance of microcapsules filled with a fluid or mobile material for reacting with the iron and/or aluminum or magnesium to inhibit corrosion arising from the facing surfaces of the mixed metal panels. The protective material is released from the microcapsules for diffusion through the cured or uncured interfacial adhesive to react with one or both panel surfaces and form a protective coating on the surfaces.Type: GrantFiled: June 8, 2007Date of Patent: January 24, 2012Assignee: GM Global Technology Operations LLCInventors: Jessica A. Schroeder, Anil K. Sachdev, Mark W. Verbrugge, Thomas C. Pederson
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Patent number: 8091608Abstract: A method of forming a hollow sand core involves placing a preform into a cavity defined in a mold, where the preform has a predetermined configuration. A granular material is then introduced into the mold cavity and around the preform. The introduced granular material is established around the preform to form the hollow sand core. The preform is deformed in a manner sufficient to enable removal of the preform from inside the hollow sand core, and then is removed from the sand core. The removal of the preform exposes a hollow portion of the sand core.Type: GrantFiled: May 15, 2009Date of Patent: January 10, 2012Assignee: GM Global Technology Operations LLCInventors: Michael J. Walker, Thomas C. Pederson
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Patent number: 7984750Abstract: A sand core is prepared for use in defining a surface of a cast metal article. The core is formed of sand particles bonded with a polyurethane resin, preferably a polyol moiety-containing polyurethane resin. An alkali metal hydroxide, and optionally a glycol, is mixed with precursors of the polyurethane before they are mixed with sand particles for molding and curing the core. The hydroxide and glycol may be encapsulated to prevent interference with core molding. The hydroxide and glycol is distributed in the polyurethane binder resin and used to reduce the decomposition temperature of the core binder during casting. This practice is particularly useful in removing core sand from castings of light metal, lower casting temperature metal alloys.Type: GrantFiled: November 14, 2008Date of Patent: July 26, 2011Assignee: GM Global Technology Operations LLCInventors: Thomas C. Pederson, Anil K. Sachdev
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Publication number: 20110064941Abstract: Microencapsulated chemical(s), as water-soluble solid particles, are embedded in at least one the paint layers on the surface of a magnesium article used in an automobile. If the protective paint film is scratched or otherwise mechanically disturbed to expose the surface of the magnesium article the capsules will be ruptured. This will expose the encapsulated chemical(s) to ambient water enabling them to dissolve and form an aqueous solution capable of reacting with the exposed magnesium to form a protective passivating layer on the exposed magnesium to resist corrosion. In a second embodiment the encapsulated chemicals include a deliquescing compound for extraction of moisture from the atmosphere sufficient to induce dissolution of the passivating layer-forming chemical(s) and trigger the formation of the passivating layer in the absence of ambient water.Type: ApplicationFiled: September 11, 2009Publication date: March 17, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Anil K. Sachdev, Thomas C. Pederson, Mark W. Verbrugge
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Publication number: 20110041796Abstract: An oil filter and oil-additive dispensing device comprising an oil filter and oil additive replenishment system further comprising: a full-flow oil filter; a by-pass oil filter; an oil additive dispensing system; and an on-vehicle controller to dispense additive as required, track additive consumption and signal the need for a replacement system is described. Also a method of using such oil filter and oil-additive dispensing device to extend the useful life of lubricating oil in a vehicle engine is described.Type: ApplicationFiled: August 21, 2009Publication date: February 24, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Anil K. Sachdev, Edward P. Becker, Thomas A. Perry, Emerson J. Adams, Thomas C. Pederson
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Publication number: 20100288460Abstract: A method of forming a hollow sand core involves placing a preform into a cavity defined in a mold, where the preform has a predetermined configuration. A granular material is then introduced into the mold cavity and around the preform. The introduced granular material is established around the preform to form the hollow sand core. The preform is deformed in a manner sufficient to enable removal of the preform from inside the hollow sand core, and then is removed from the sand core. The removal of the preform exposes a hollow portion of the sand core.Type: ApplicationFiled: May 15, 2009Publication date: November 18, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: MICHAEL J. WALKER, THOMAS C. PEDERSON
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Publication number: 20100212854Abstract: An exemplary method for forming a sand core includes forming a core insert; forming a sand core precursor around the core insert; and creating at least one passage within the sand core precursor by removing or otherwise transforming a portion of the core insert, wherein the at least one passage includes at least one exit point. The sand core may then be utilized in a casting mold assembly to form a cast part.Type: ApplicationFiled: February 23, 2009Publication date: August 26, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATION, INC.Inventors: MICHAEL J. WALKER, THOMAS C. PEDERSON, JASON R. TRAUB, ANIL K. SACHDEV
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Publication number: 20100122791Abstract: A sand core is prepared for use in defining a surface of a cast metal article. The core is formed of sand particles bonded with a polyurethane resin, preferably a polyol moiety-containing polyurethane resin. An alkali metal hydroxide, and optionally a glycol, is mixed with precursors of the polyurethane before they are mixed with sand particles for molding and curing the core. The hydroxide and glycol may be encapsulated to prevent interference with core molding. The hydroxide and glycol is distributed in the polyurethane binder resin and used to reduce the decomposition temperature of the core binder during casting. This practice is particularly useful in removing core sand from castings of light metal, lower casting temperature metal alloys.Type: ApplicationFiled: November 14, 2008Publication date: May 20, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Thomas C. Pederson, Anil K. Sachdev
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Publication number: 20080305362Abstract: In an illustrative embodiment, two panels of different materials may be bonded with a structural adhesive composition comprising microcapsules containing corrosion inhibiting materials for protecting the panels from corrosion. For example, a steel vehicle door outer panel may be bonded to an aluminum alloy or magnesium alloy inner panel using an epoxy adhesive. Dispersed within the uncured adhesive are an abundance of microcapsules filled with a fluid or mobile material for reacting with the iron and/or aluminum or magnesium to inhibit corrosion arising from the facing surfaces of the mixed metal panels. The protective material is released from the microcapsules for diffusion through the cured or uncured interfacial adhesive to react with one or both panel surfaces and form a protective coating on the surfaces.Type: ApplicationFiled: June 8, 2007Publication date: December 11, 2008Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Jessica A. Schroeder, Anil K. Sachdev, Mark W. Verbrugge, Thomas C. Pederson
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Patent number: 7360577Abstract: Process for the Lost-foam casting of aluminum or magnesium including spacing the cooling face of a chill from a selected surface of a pyrolizable polymeric foam pattern so as to provide at least a 0.5 mm gap therebetween, and filling the gap with Al or Mg melt so as to displace any pyrolysis products therein away from the cooling face, and otherwise prevent such products from becoming trapped by the melt against the cooling face of the chill.Type: GrantFiled: June 27, 2006Date of Patent: April 22, 2008Assignee: GM Global Technology Operations, Inc.Inventors: Thomas C. Pederson, Andrew R. Moore
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Patent number: 7318468Abstract: Lost foam pattern assemblies formed by gluing together a plurality of EPS foam pattern segments with a polystyrene-like glue comprising an aromatic resin that has a molecular weight less than 10,000 and thermally degrades at temperatures no greater than said EPS. The glue contains sufficient first plasticizer, miscible with the resin, to impart a viscosity of about 0.1 to 5 PaS @ about 100-135° C. to the glue. The glue may optionally include a second, limited-miscibility, plasticizer to accelerate the hardening rate and increase the ultimate rigidity of the glue.Type: GrantFiled: May 9, 2006Date of Patent: January 15, 2008Assignee: GM Global Technology Operations, Inc.Inventor: Thomas C. Pederson
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Publication number: 20070295469Abstract: Process for the Lost-foam casting of aluminum or magnesium including spacing the cooling face of a chill from a selected surface of a pyrolizable polymeric foam pattern so as to provide at least a 0.5 mm gap therebetween, and filling the gap with Al or Mg melt so as to displace any pyrolysis products therein away from the cooling face, and otherwise prevent such products from becoming trapped by the melt against the cooling face of the chill.Type: ApplicationFiled: June 27, 2006Publication date: December 27, 2007Inventors: Thomas C. Pederson, Andrew R. Moore
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Patent number: 7059382Abstract: A process including topically applying a finely divided powder onto a plurality of polystyrene beads. The finely divided powder includes brominated compounds including a brominated alkane having at least one substituent aromatic group. The polystyrene beads are pre-expanded with the topically applied brominated compounds and a molded pattern is formed from the pre-expanded polystyrene beads. A lost foam casting mold is formed with the molded pattern. Molten metal is poured into the lost foam casting mold and onto the molded pattern to depolymerize the polystyrene beads with the topically applied brominated compounds.Type: GrantFiled: August 21, 2003Date of Patent: June 13, 2006Assignee: General Motors CorporationInventor: Thomas C. Pederson
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Patent number: 6901989Abstract: In the lost foam casting of aluminum, coating a fugitive pattern with a refractory coating containing a thermally stable, water-insoluble, acid-gasifiable (e.g. CaCO3) compound, and contacting the casting, with the coating thereon, with an acid to dissociate and gasify the compound and rupture the coating. Preferably, any thermal degradation products from the pattern residing in the coating are neutralized to promote wetting of the coating.Type: GrantFiled: June 14, 1999Date of Patent: June 7, 2005Assignee: General Motors CorporationInventors: Nicholas Edward Sargent, June-Sang Siak, Mei Cai, Thomas C. Pederson, Sheila Farrokhalaee Kia