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).

  • Patent number: 9371991
    Abstract: 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: Grant
    Filed: January 18, 2012
    Date of Patent: June 21, 2016
    Assignee: PRECISION COMBUSTION, INC.
    Inventors: Richard Mastanduno, David Spence, Subir Roychoudhury, Bruce Crowder
  • Publication number: 20160045381
    Abstract: 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: Application
    Filed: August 11, 2015
    Publication date: February 18, 2016
    Applicant: TRIBALCO, LLC
    Inventor: David Spence
  • Patent number: 9102531
    Abstract: 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: Grant
    Filed: September 13, 2012
    Date of Patent: August 11, 2015
    Assignee: PRECISION COMBUSTION, INC.
    Inventors: Subir Roychoudhury, Joel M DesJardins, David Spence, Richard Mastanduno, Dennis E. Walsh, Lisa Burns
  • Patent number: 8784515
    Abstract: 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: Grant
    Filed: October 14, 2010
    Date of Patent: July 22, 2014
    Assignees: Precision Combustion, Inc., Honda Motor Co., Ltd.
    Inventors: Subir Roychoudhury, Richard Mastanduno, David Spence, Jun Iwamoto, Go Motohashi
  • Publication number: 20130266903
    Abstract: 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: Application
    Filed: January 18, 2012
    Publication date: October 10, 2013
    Applicant: Precision Combustion, Inc.
    Inventors: Richard Mastanduno, David Spence, Subir Roychoudhury, Bruce Crowder
  • Patent number: 8439990
    Abstract: 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: Grant
    Filed: July 21, 2009
    Date of Patent: May 14, 2013
    Assignees: 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
  • Patent number: 8387380
    Abstract: 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: Grant
    Filed: October 8, 2009
    Date of Patent: March 5, 2013
    Assignee: Precision Combustion, Inc.
    Inventors: Subir Roychoudhury, David Spence, Bruce B. Crowder, Richard T. Mastanduno, Jonathan Berry
  • Publication number: 20130017608
    Abstract: This invention relates to a novel Pleuromutilin gene cluster and methods of increasing yields of Pleuromutilin produced by Clitopilus and related basidiomycete species.
    Type: Application
    Filed: October 28, 2010
    Publication date: January 17, 2013
    Applicant: Glaxo Wellcome House
    Inventors: Andrew Mark Bailey, Gatherine Collins, Amanda Crawford, Gary Foster, Alison Michelle Griffin, Sreedhar Kilaru, Angela Scrogham, David Spence
  • Patent number: 8337757
    Abstract: 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: Grant
    Filed: February 9, 2009
    Date of Patent: December 25, 2012
    Assignee: Precision Combustion, Inc.
    Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
  • Patent number: 8258357
    Abstract: 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: Grant
    Filed: March 25, 2009
    Date of Patent: September 4, 2012
    Assignee: Lummus Technology Inc.
    Inventors: Kerman Dukandar, David Spence, Sunil Panditrao
  • Publication number: 20120090238
    Abstract: 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: Application
    Filed: October 14, 2010
    Publication date: April 19, 2012
    Inventors: Subir Roychoudhury, Richard Mastanduno, David Spence, Jun Iwamoto, Go Motohashi
  • Publication number: 20110016791
    Abstract: 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: Application
    Filed: July 21, 2009
    Publication date: January 27, 2011
    Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
  • Publication number: 20100249471
    Abstract: 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: Application
    Filed: March 25, 2009
    Publication date: September 30, 2010
    Inventors: Kerman Dukandar, David Spence, Sunil Panditrao
  • Publication number: 20100126165
    Abstract: 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: Application
    Filed: October 8, 2009
    Publication date: May 27, 2010
    Inventors: Subir Roychoudhury, David Spence, Bruce B. Crowder, Richard T. Mastanduno, Jonathan Berry
  • Publication number: 20090252661
    Abstract: 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: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
  • Publication number: 20090228146
    Abstract: 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: Application
    Filed: February 9, 2009
    Publication date: September 10, 2009
    Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
  • Publication number: 20080078175
    Abstract: 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: Application
    Filed: May 14, 2007
    Publication date: April 3, 2008
    Inventors: Subir Roychoudhury, David Spence, Bruce Crowder, Jonathan Berry, Richard Mastanduno
  • Publication number: 20080013586
    Abstract: 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: Application
    Filed: September 5, 2006
    Publication date: January 17, 2008
    Inventors: David Spence, James Kafka, Alan Petersen
  • Publication number: 20070249729
    Abstract: 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: Application
    Filed: December 20, 2004
    Publication date: October 25, 2007
    Inventors: Bradley Urquhart, David Freeman, Andrew House, David Spence
  • Publication number: 20070237191
    Abstract: 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: Application
    Filed: January 30, 2007
    Publication date: October 11, 2007
    Inventors: James Kafka, James Clark, David Spence