Patents by Inventor David Spence
David Spence 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: 9371991Abstract: An apparatus and process for vaporizing and, optionally, igniting a liquid fuel, preferably, a distillate fuel. The apparatus includes the following components: a heat-conductive reticulated screen positioned within a chamber; a first inlet path into the chamber for delivering a liquid fuel onto the screen; a second inlet path into the chamber for contacting an oxidant with the screen and fuel; a means for heating the screen to a temperature sufficient to vaporize and, optionally, ignite the liquid fuel; and a recuperator in fluid communication with the chamber for transferring heat from the chamber to the second inlet path. The apparatus is suitably employed in compact and portable oxidation reactors, for example, in external combustion engines, catalytic partial oxidation reformers, and hybrid combustors operating in flame and/or catalytic modes.Type: GrantFiled: January 18, 2012Date of Patent: June 21, 2016Assignee: PRECISION COMBUSTION, INC.Inventors: Richard Mastanduno, David Spence, Subir Roychoudhury, Bruce Crowder
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Publication number: 20160045381Abstract: Methods and systems are provided that decrease the time and distance from point of wounding to definitive medical care through integrated and specialized soldier survival medical kits and modules. These modules are mission-ready and usable out of the box, easily mission-configured and deployed by tactical operators to any operational location to ensure life saving measures can be rapidly and effectively executed if the need arises. They avoid unnecessary assembly and may involve no or minimal assembly. They make medical care items and supplies easily accessible, while minimizing encumbrances. They include the right equipment positioned in the right places for accessibility, and increase efficiency in use and shipment, and the time savings may save lives. Each module is designed to enable the operator to get the most out of the equipment on hand. Items are specifically chosen and packed in a way that is most efficient, easily accessible, and easily packed to reduce time and effort of use.Type: ApplicationFiled: August 11, 2015Publication date: February 18, 2016Applicant: TRIBALCO, LLCInventor: David Spence
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Patent number: 9102531Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: GrantFiled: September 13, 2012Date of Patent: August 11, 2015Assignee: PRECISION COMBUSTION, INC.Inventors: Subir Roychoudhury, Joel M DesJardins, David Spence, Richard Mastanduno, Dennis E. Walsh, Lisa Burns
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Patent number: 8784515Abstract: A process of catalytic partial oxidation of a hydrocarbon fuel with an oxidant to produce partially-oxidized reaction products including hydrogen, with simultaneous in-situ coke removal. The process involves feeding a hydrocarbon fuel and an oxidant to a reactor in a fuel-rich feed ratio; reacting the fuel and oxidant for a fuel-rich cycle-time so as to produce a partially-oxidized reaction product; varying the fuel feed, or the oxidant feed, or both feeds to produce a fuel-lean feed to the reactor; maintaining the fuel-lean feed for a fuel-lean cycle-time sufficient to reduce coke deposits while maintaining a substantially constant yield of partially-oxidized reaction product; and alternating between the fuel-rich and fuel-lean operating cycles.Type: GrantFiled: October 14, 2010Date of Patent: July 22, 2014Assignees: Precision Combustion, Inc., Honda Motor Co., Ltd.Inventors: Subir Roychoudhury, Richard Mastanduno, David Spence, Jun Iwamoto, Go Motohashi
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Publication number: 20130266903Abstract: An apparatus and process for vaporizing and, optionally, igniting a liquid fuel, preferably, a distillate fuel. The apparatus includes the following components: a heat-conductive reticulated screen positioned within a chamber; a first inlet path into the chamber for delivering a liquid fuel onto the screen; a second inlet path into the chamber for contacting an oxidant with the screen and fuel; a means for heating the screen to a temperature sufficient to vaporize and, optionally, ignite the liquid fuel; and a recuperator in fluid communication with the chamber for transferring heat from the chamber to the second inlet path. The apparatus is suitably employed in compact and portable oxidation reactors, for example, in external combustion engines, catalytic partial oxidation reformers, and hybrid combustors operating in flame and/or catalytic modes.Type: ApplicationFiled: January 18, 2012Publication date: October 10, 2013Applicant: Precision Combustion, Inc.Inventors: Richard Mastanduno, David Spence, Subir Roychoudhury, Bruce Crowder
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Patent number: 8439990Abstract: An apparatus for fuel reforming is provided that utilizes pulsed injectors for a fuel flow controller and an air flow controller, and the injectors are integrated with an atomizing mixer thereby producing a fuel-air mixture having an O/C Ratio which, in turn, is passed to a Catalytic Partial Oxidation reactor. Use of this apparatus permits beneficial long term operation of this Catalytic Partial Oxidation reactor.Type: GrantFiled: July 21, 2009Date of Patent: May 14, 2013Assignees: Precision Combustion, Inc., Honda Motor Co., Ltd.Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Patent number: 8387380Abstract: The invention provides an apparatus and a method for transferring heat by conduction to the internal heat acceptor of an external combustion engine. Fuel and air are introduced into a combustion chamber and mixed to form an air/fuel mixture. The air/fuel mixture is directed into a catalytic reactor that is positioned in direct contact (non-spaced-apart relation) with the heater head. Heat is transferred via conduction from the catalytic reactor to the heater head; and the catalytic reaction products are exhausted with heat recuperation.Type: GrantFiled: October 8, 2009Date of Patent: March 5, 2013Assignee: Precision Combustion, Inc.Inventors: Subir Roychoudhury, David Spence, Bruce B. Crowder, Richard T. Mastanduno, Jonathan Berry
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Publication number: 20130017608Abstract: This invention relates to a novel Pleuromutilin gene cluster and methods of increasing yields of Pleuromutilin produced by Clitopilus and related basidiomycete species.Type: ApplicationFiled: October 28, 2010Publication date: January 17, 2013Applicant: Glaxo Wellcome HouseInventors: Andrew Mark Bailey, Gatherine Collins, Amanda Crawford, Gary Foster, Alison Michelle Griffin, Sreedhar Kilaru, Angela Scrogham, David Spence
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Patent number: 8337757Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: GrantFiled: February 9, 2009Date of Patent: December 25, 2012Assignee: Precision Combustion, Inc.Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
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Patent number: 8258357Abstract: This invention relates to an integrated process for the efficient production of olefins from C4 feedstocks comprising butane and more particularly to a method of producing propylene and butadiene. The process combines a dehydrogenation unit with an olefin conversion unit to convert butane feedstock to propylene and butadiene products. The combined catadiene-OCT process produces yields of propylene from normal butane in excess of 70%.Type: GrantFiled: March 25, 2009Date of Patent: September 4, 2012Assignee: Lummus Technology Inc.Inventors: Kerman Dukandar, David Spence, Sunil Panditrao
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Publication number: 20120090238Abstract: A process of catalytic partial oxidation of a hydrocarbon fuel, such as diesel, with an oxidant, such as air, to produce a partially-oxidized reaction product, such as a hydrogen-containing fuel gas, with simultaneous in-situ coke removal. The process involves feeding a hydrocarbon fuel and an oxidant to a reactor in a fuel-rich feed ratio; reacting the fuel and oxidant for a fuel-rich cycle-time so as to produce a partially-oxidized reaction product; varying the fuel feed, or the oxidant feed, or both feeds to produce a fuel-lean feed to the reactor; maintaining the fuel-lean feed for a fuel-lean cycle-time sufficient to reduce coke deposits while maintaining a substantially constant yield of partially-oxidized reaction product; and alternating between the fuel-rich and fuel-lean operating cycles.Type: ApplicationFiled: October 14, 2010Publication date: April 19, 2012Inventors: Subir Roychoudhury, Richard Mastanduno, David Spence, Jun Iwamoto, Go Motohashi
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Publication number: 20110016791Abstract: An apparatus for fuel reforming is provided that utilizes pulsed injectors for a fuel flow controller and an air flow controller, and the injectors are integrated with an atomizing mixer thereby producing a fuel-air mixture having an O/C Ratio which, in turn, is passed to a Catalytic Partial Oxidation reactor. Use of this apparatus permits beneficial long term operation of this Catalytic Partial Oxidation reactor.Type: ApplicationFiled: July 21, 2009Publication date: January 27, 2011Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Publication number: 20100249471Abstract: This invention relates to an integrated process for the efficient production of olefins from C4 feedstocks comprising butane and more particularly to a method of producing propylene and butadiene. The process combines a dehydrogenation unit with an olefin conversion unit to convert butane feedstock to propylene and butadiene products. The combined catadiene-OCT process produces yields of propylene from normal butane in excess of 70%.Type: ApplicationFiled: March 25, 2009Publication date: September 30, 2010Inventors: Kerman Dukandar, David Spence, Sunil Panditrao
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Publication number: 20100126165Abstract: The invention provides an apparatus and a method for transferring heat by conduction to the internal heat acceptor of an external combustion engine. Fuel and air are introduced into a combustion chamber and mixed to form an air/fuel mixture. The air/fuel mixture is directed into a catalytic reactor that is positioned in direct contact (non-spaced-apart relation) with the heater head. Heat is transferred via conduction from the catalytic reactor to the heater head; and the catalytic reaction products are exhausted with heat recuperation.Type: ApplicationFiled: October 8, 2009Publication date: May 27, 2010Inventors: Subir Roychoudhury, David Spence, Bruce B. Crowder, Richard T. Mastanduno, Jonathan Berry
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Publication number: 20090252661Abstract: A fuel reformer includes a reforming portion having a tubular catalytic converter that is composed of a substrate supporting the catalytic component, and is arranged to have a center axis extending along the supply direction of the fuel and oxidizer derived from a supply portion, and a communication passage arranged along an inner wall of the catalytic converter and communicating with the supply portion. The fuel and oxidizer supplied from the supply portion to the communication passage pass from the inner wall of the catalytic converter to an outer wall thereof by forced convection, thereby reforming the fuel.Type: ApplicationFiled: April 7, 2008Publication date: October 8, 2009Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Publication number: 20090228146Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: ApplicationFiled: February 9, 2009Publication date: September 10, 2009Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
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Publication number: 20080078175Abstract: The invention provides a method for transferring heat by conduction to the internal heat acceptor of an external combustion engine. Fuel and air are introduced and mixed to form an air/fuel mixture. The air/fuel mixture is directed into a catalytic reactor that is positioned substantially adjacent to the heater head. Heat is transferred via conduction from the catalytic reactor to the heater head and the catalytic reaction products are exhausted.Type: ApplicationFiled: May 14, 2007Publication date: April 3, 2008Inventors: Subir Roychoudhury, David Spence, Bruce Crowder, Jonathan Berry, Richard Mastanduno
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Publication number: 20080013586Abstract: Methods and devices for narrow band diode pumping of various laser gain materials which for some embodiments reduces or eliminates some thermal problems as well as other optical problems associated with diode pumping of crystalline materials, including anisotropic materials. In some embodiments, a VBG is used to narrow the bandwidth of the pump light from a pump diode source. In some embodiments, pump light from a diode pump source is chosen to have a wavelength centered substantially at an intersection of absorption coefficients for different polarizations of pump light in the laser gain material.Type: ApplicationFiled: September 5, 2006Publication date: January 17, 2008Inventors: David Spence, James Kafka, Alan Petersen
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Publication number: 20070249729Abstract: A method of treating elevated plasma total homocysteine levels (tHc) in subjects with end stage renal disease (ESRD) is disclosed, said treatment comprising the administration of sodium 2-mercaptoethylsulfonate (MESNA) immediately prior to, or concurrently with, performing hemodialysis on said patient.Type: ApplicationFiled: December 20, 2004Publication date: October 25, 2007Inventors: Bradley Urquhart, David Freeman, Andrew House, David Spence
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Publication number: 20070237191Abstract: The present application is directed to various embodiments of laser systems which include a laser oscillator and a pump source configured to produce coherent light at high repetition rates and with short pulse durations, wherein the output from the laser oscillator is then amplified in a laser amplifier, which includes a pump source, the output from the laser amplifier has increased average and peak power, but preserves the short pulse duration and high repetition rate of the laser oscillator.Type: ApplicationFiled: January 30, 2007Publication date: October 11, 2007Inventors: James Kafka, James Clark, David Spence