Patents by Inventor Lawrence G. Clawson

Lawrence G. Clawson 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).

  • Publication number: 20110119160
    Abstract: In one aspect, the present invention relates to a web site which addresses the above difficulties and others by providing site where an author may upload creative works for sale at a price set by the author. The website allows users to purchase and rate the works, creating an environment where high-quality works may be identified by users. The website further systematizes the process by which works are acquired by an investment pool, which may be an investment pool run by the website operator. The investment pool will offer to buy the rights of any work achieving a given amount of sales or positive feedback on the site.
    Type: Application
    Filed: January 21, 2011
    Publication date: May 19, 2011
    Inventors: Robert C. Houvener, Lawrence G. Clawson, JR.
  • Publication number: 20090248542
    Abstract: In one aspect, the present invention relates to a web site which addresses the above difficulties and others by providing site where an author may upload creative works for sale at a price set by the author. The website allows users to purchase and rate the works, creating an environment where high-quality works may be identified by users. The website further systematizes the process by which works are acquired by an investment pool, which may be an investment pool run by the website operator. The investment pool will offer to buy the rights of any work achieving a given amount of sales or positive feedback on the site.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 1, 2009
    Inventors: Robert C. Houvener, Lawrence G. Clawson, JR.
  • Patent number: 7434547
    Abstract: A system for making and storing hydrogen comprises an IC engine, a thermal reactor to convert hydrocarbon fuels to reformate, and a separation means to separate the reformate into a hydrogen stream and a hydrogen depleted reformate stream. The hydrogen stream is compressed and stored. The hydrogen depleted reformate stream is split and sent to a thermal reactor and the IC engine. The IC engine drives the compressor for hydrogen as well as the compressor for the fuel inlet to the system. The described system and process achieves high efficiency in fuel conversion and hydrogen storage.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: October 14, 2008
    Assignee: Nuvera Fuel Cells, Inc.
    Inventor: Lawrence G. Clawson
  • Patent number: 7367996
    Abstract: A hydrocarbon fuel processing reactor for generating a hydrogen-enriched reformate from hydrocarbons is disclosed. A plurality of shells are arranged coaxially having a gap defined between each of the successive shells, thereby forming a plurality of coaxial zones. The shells are configured to permit heat transfer from one zone to another. Fluid streams for reactions within the reactor are preheated by heat transfer from adjacent zones.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: May 6, 2008
    Assignee: Nuvera Fuel Cells, Inc.
    Inventors: Lawrence G. Clawson, Mark R. Hagan, Chunming Frank Qi, William F. Northrop
  • Patent number: 7066973
    Abstract: A hydrocarbon fuel reformer for producing diatomic hydrogen gas is disclosed. The reformer includes a first reaction vessel, a shift reactor vessel annularly disposed about the first reaction vessel, including a first shift reactor zone, and a first helical tube disposed within the first shift reactor zone having an inlet end communicating with a water supply source. The water supply source is preferably adapted to supply liquid-phase water to the first helical tube at flow conditions sufficient to ensure discharge of liquid-phase and steam-phase water from an outlet end of the first helical tube. The reformer may further include a first catalyst bed disposed in the first shift reactor zone, having a low-temperature shift catalyst in contact with the first helical tube.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: June 27, 2006
    Assignee: Nuvera Fuel Cells
    Inventors: Jeffrey M. Bentley, Lawrence G. Clawson, William L. Mitchell, Matthew H. Dorson
  • Patent number: 7062915
    Abstract: High-efficiency combustion engines, including Otto cycle engines, use a steam-diluted fuel charge at elevated pressure. Air is compressed, and water is evaporated into the compressed air via the partial pressure effect using waste heat from the engine. The resultant pressurized air-steam mixture then burned in the engine with fuel, preferably containing hydrogen to maintain flame front propagation. The high-pressure, steam-laden engine exhaust is used to drive an expander to provide additional mechanical power. The exhaust can also be used to reform fuel to provide hydrogen for the engine combustion. The engine advantageously uses the partial pressure effect to convert low-grade waste heat from engine into useful mechanical power. The engine is capable of high efficiencies (e.g. >50%), with minimal emissions.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: June 20, 2006
    Inventor: Lawrence G. Clawson
  • Patent number: 6986797
    Abstract: An auxiliary reactor for use with a reformer reactor having at least one reaction zone, and including a burner for burning fuel and creating a heated auxiliary reactor gas stream, and heat exchanger for transferring heat from auxiliary reactor gas stream and heat transfer medium, preferably two-phase water, to reformer reaction zone. Auxiliary reactor may include first cylindrical wall defining a chamber for burning fuel and creating a heated auxiliary reactor gas stream, the chamber having an inlet end, an outlet end, a second cylindrical wall surrounding first wall and a second annular chamber there between. The reactor being configured so heated auxiliary reactor gas flows out the outlet end and into and through second annular chamber and conduit which is disposed in second annular chamber, the conduit adapted to carry heat transfer medium and being connectable to reformer reaction zone for additional heat exchange.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: January 17, 2006
    Assignee: Nuvera Fuel Cells Inc.
    Inventors: Lawrence G. Clawson, Matthew H. Dorson, William L. Mitchell, Brian J. Nowicki, Jeffrey M. Bentley, Robert Davis, Jennifer W. Rumsey
  • Patent number: 6921595
    Abstract: The efficiency of a combination reformer/fuel cell system is significantly improved by recapturing the energy value of heat generated in the fuel cell and producing additional power. The cooling water from the fuel cell is mixed, entirely or in part, with sufficient or excess compressed air, and at least partially evaporates in the compressed air. The air is at least sufficient to support the oxidative reactions in the fuel cell and also to serve as oxidant in a burner that provides heat to reform fuel/steam mixtures into hydrogen-containing reformate. This air/steam mixture, after leaving the fuel cell, is further heated by heat exchange with the reformate stream and reformate-producing modules, and with the exhaust stream of the burner. The steam/air mixture is injected into the burner, optionally after superheating in the burner exhaust, and is reacted with fuel in the burner. The burner exhaust may be used to provide heat to a fuel reforming reaction.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: July 26, 2005
    Assignee: Nuvera Fuel Cells, Inc.
    Inventors: Lawrence G. Clawson, Mark R. Hagan
  • Patent number: 6916564
    Abstract: A hydrogen fuel cell power system having improved efficiency comprises a fuel cell, a source of hydrogen gas, a compressor for creating a pressurized air stream, and a liquid supply which is heated by waste heat form the power system and evaporates into the pressurized air stream to produce a pressurized air and steam mixture. The pressurized air/steam mixture, which is preferably used as the oxidant in the fuel cell, is combusted with fuel in a burner to produce a high-temperature steam-laden exhaust stream. The high-temperature steam-laden exhaust stream drives an expander to produce a power output, and a power take-off from the expander uses the expander power to, for instance, drive an electrical generator, or drive other system components. The evaporation of liquid can take place external to the fuel cell, or can take place directly within the fuel cell, preferably using a cooling liquid that is directly injected into the fuel cell.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: July 12, 2005
    Assignee: Nuvera Fuel Cells, Inc.
    Inventors: Lawrence G. Clawson, Christopher J. O'Brien, Mark R. Hagan
  • Patent number: 6861169
    Abstract: Interconnection layouts are described that are particularly effective in the construction of a steam reformer/fuel cell combination for providing domestic heat and/or hot water as well as electricity. A distinguishing feature of the interconnections is that they permit the operator to optimize the efficiency of operation of the integrated system, and provide a higher efficiency at optimum operation compared to prior art designs. Combinations of reformer/fuel cell systems with conventional furnaces or boilers are also described.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: March 1, 2005
    Assignee: Nuvera Fuel Cells, Inc.
    Inventors: Mark R. Hagan, Matthew H. Dorson, Lawrence G. Clawson, Michael Leschiner
  • Patent number: 6817182
    Abstract: High-efficiency combustion engines, including Otto cycle engines, use a steam-diluted fuel charge at elevated pressure. Air is compressed, and water is evaporated into the compressed air via the partial pressure effect using waste heat from the engine. The resultant pressurized air-steam mixture then burned in the engine with fuel, preferably containing hydrogen to maintain flame front propagation. The high-pressure, steam-laden engine exhaust is used to drive an expander to provide additional mechanical power. The exhaust can also be used to reform fuel to provide hydrogen for the engine combustion. The engine advantageously uses the partial pressure effect to convert low-grade waste heat from engine into useful mechanical power. The engine is capable of high efficiencies (e.g. >50%), with minimal emissions.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: November 16, 2004
    Inventor: Lawrence G. Clawson
  • Patent number: 6783742
    Abstract: A reformer for producing a hydrogen-rich gas includes a first zone, a second zone, a third zone, a fourth zone and a product gas collection space. The zones are sequentially adjacent. A flow path is provided for directing flow of a reaction stream in diverging directions from the first zone into the second zone, and continuing in the same general diverging directions through the second zone, third zone, and fourth zone. Directing the flow in diverging directions permits flow into and through a zone over more that just a single cross-sectional geometry of the zone or a single cross-section of the flow path transverse to the direction of flows. This configuration can be used to require a lower pressure for flowing the reaction stream so as to reduce the parasitic requirements of the reactor, and can also be used to increase throughput of the reactor.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: August 31, 2004
    Assignee: Nuvera Fuel Cells
    Inventors: Jeffrey M. Bentley, William L. Mitchell, Lawrence G. Clawson, James C. Cross, III
  • Publication number: 20040037758
    Abstract: According to the present invention, a temperature profile within a preferential oxidation reactor is controlled using a two phase water/steam system to provide a temperature range within the reactor (10) which favors the selective oxidation of CO in a hydrogen rich reformate stream. The reformate is flowed in a mixture with oxygen over a preferential oxidation catalyst (17). The temperature profile is controlled by flowing a stream of water proximate to the preferential oxidation catalyst (17) so as the stream of water and the reformate stream passing over the catalyst (17) are in a heat transfer arrangement. The stream of water is maintained as a two phase stream from a point at which the water reaches its boiling temperature to a point proximate an outlet from which the stream of water exits the reactor (10).
    Type: Application
    Filed: June 13, 2003
    Publication date: February 26, 2004
    Inventors: Darryl Pollica, William F. Northrop, Chunming Qi, Mark R. Hagan, Alexis Smith, Lawrence G. Clawson
  • Patent number: 6641625
    Abstract: A hydrocarbon reformer system including a first reactor configured to generate hydrogen-rich reformate by carrying out at least one of a non-catalytic thermal partial oxidation, a catalytic partial oxidation, a steam reforming, and any combinations thereof, a second reactor in fluid communication with the first reactor to receive the hydrogen-rich reformate, and having a catalyst for promoting a water gas shift reaction in the hydrogen-rich reformate, and a heat exchanger having a first mass of two-phase water therein and configured to exchange heat between the two-phase water and the hydrogen-rich reformate in the second reactor, the heat exchanger being in fluid communication with the first reactor so as to supply steam to the first reactor as a reactant is disclosed. The disclosed reformer includes an auxiliary reactor configured to generate heated water/steam and being in fluid communication with the heat exchanger of the second reactor to supply the heated water/steam to the heat exchanger.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: November 4, 2003
    Assignee: Nuvera Fuel Cells, Inc.
    Inventors: Lawrence G. Clawson, Matthew H. Dorson, William L. Mitchell, Brian J. Nowicki, Johannes Thijssen, Robert Davis, Christopher Papile, Jennifer W. Rumsey, Nathan Longo, James C. Cross, III, Vincent Rizzo, Gunther Kleeburg, Michael Rindone, Stephen G. Block, Maria Sun, Brian D. Morriseau, Mark R. Hagan, Brian Bowers
  • Publication number: 20030167768
    Abstract: High-efficiency combustion engines, including Otto cycle engines, use a steam-diluted fuel charge at elevated pressure. Air is compressed, and water is evaporated into the compressed air via the partial pressure effect using waste heat from the engine. The resultant pressurized air-steam mixture then burned in the engine with fuel, preferably containing hydrogen to maintain flame front propagation. The high-pressure, steam-laden engine exhaust is used to drive an expander to provide additional mechanical power. The exhaust can also be used to reform fuel to provide hydrogen for the engine combustion. The engine advantageously uses the partial pressure effect to convert low-grade waste heat from engine into useful mechanical power. The engine is capable of high efficiencies (e.g.>50%), with minimal emissions.
    Type: Application
    Filed: December 4, 2002
    Publication date: September 11, 2003
    Inventor: Lawrence G. Clawson
  • Publication number: 20030170518
    Abstract: A hydrogen fuel cell power system having improved efficiency comprises a fuel cell, a source of hydrogen gas, a compressor for creating a pressurized air stream, and a liquid supply which is heated by waste heat form the power system and evaporates into the pressurized air stream to produce a pressurized air and steam mixture. The pressurized air/steam mixture, which is preferably used as the oxidant in the fuel cell, is combusted with fuel in a burner to produce a high-temperature steam-laden exhaust stream. The high-temperature steam-laden exhaust stream drives an expander to produce a power output, and a power take-off from the expander uses the expander power to, for instance, drive an electrical generator, or drive other system components. The evaporation of liquid can take place external to the fuel cell, or can take place directly within the fuel cell, preferably using a cooling liquid that is directly injected into the fuel cell.
    Type: Application
    Filed: December 31, 2002
    Publication date: September 11, 2003
    Applicant: Nuvera Fuel Cells, Inc.
    Inventors: Lawrence G. Clawson, Christopher J. O'Brien, Mark R. Hagan
  • Publication number: 20020182457
    Abstract: A hydrocarbon fuel processing reactor for generating a hydrogen-enriched reformate from hydrocarbons is disclosed. A plurality of shells are arranged coaxially having a gap defined between each of the successive shells, thereby forming a plurality of coaxial zones. The shells are configured to permit heat transfer from one zone to another. Fluid streams for reactions within the reactor are preheated by heat transfer from adjacent zones.
    Type: Application
    Filed: December 5, 2001
    Publication date: December 5, 2002
    Inventors: Lawrence G. Clawson, Mark R. Hagan, Chunming Frank Qi, William F. Northrop
  • Publication number: 20020172846
    Abstract: Interconnection layouts are described that are particularly effective in the construction of a steam reformer/fuel cell combination for providing domestic heat and/or hot water as well as electricity. A distinguishing feature of the interconnections is that they permit the operator to optimize the efficiency of operation of the integrated system, and provide a higher efficiency at optimum operation compared to prior art designs. Combinations of reformer/fuel cell systems with conventional furnaces or boilers are also described.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 21, 2002
    Inventors: Mark R. Hagan, Matthew H. Dorson, Lawrence G. Clawson, Michael Leshchiner
  • Patent number: 6468480
    Abstract: Hydrocarbon fuel reformer 100 suitable for producing synthesis hydrogen gas from reactions with hydrocarbons fuels, oxygen, and steam. A first tube 108 has a first tube inlet 110 and a first tube outlet 112. The first tube inlet 110 is adapted for receiving a first mixture including an oxygen-containing gas and a first fuel. A partially oxidized first reaction reformate is directed out of the first tube 108 into a mixing zone 114. A second tube 116 is annularly disposed about the first tube 108 and has a second tube inlet 118 and a second tube outlet 120. The second tube inlet 118 is adapted for receiving a second mixture including steam and a second fuel. A steam reformed second reaction reformate is directed out of the second tube 116 and into the mixing zone 114. From the mixing zone 114, the first and second reaction reformates may be directed into a catalytic reforming zone 144 containing a reforming catalyst 147.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: October 22, 2002
    Inventors: Lawrence G. Clawson, William L. Mitchell, Jeffrey M. Bentley, Johannes H. J. Thijssen
  • Publication number: 20020004152
    Abstract: The efficiency of a combination reformer/fuel cell system is significantly improved by recapturing the energy value of heat generated in the fuel cell and producing additional power. The cooling water from the fuel cell is mixed, entirely or in part, with sufficient or excess compressed air, and at least partially evaporates in the compressed air. The air is at least sufficient to support the oxidative reactions in the fuel cell and also to serve as oxidant in a burner that provides heat to reform fuel/steam mixtures into hydrogen-containing reformate. This air /steam mixture, after leaving the fuel cell, is further heated by heat exchange with the reformate stream and reformate-producing modules, and with the exhaust stream of the burner. The steam/air mixture is injected into the burner, optionally after superheating in the burner exhaust, and is reacted with fuel in the burner. The burner exhaust may be used to provide heat to a fuel reforming reaction.
    Type: Application
    Filed: May 30, 2001
    Publication date: January 10, 2002
    Inventors: Lawrence G. Clawson, Mark R. Hagan