Patents by Inventor Mark T. Holtzapple

Mark T. Holtzapple 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: 8137955
    Abstract: According to one embodiment, a method for heat treatment of a biomass includes allowing biomass in a pretreatment reactor to undergo a pre-treatment reaction process. The pre-treatment reaction process yields pretreated biomass along with soluble components. A first liquid having a first temperature is transported into the pretreatment reactor and the pretreated biomass elevates the first temperature to a second temperature. At least a portion of the soluble components are captured in the first liquid, and the at least a portion of the soluble components in the first liquid and the first liquid are removed from the pretreatment reactor. A second liquid having a third temperature is transported into the pretreatment reactor and the pretreated biomass elevates the third temperature to a fourth temperature, the fourth temperature being less than second temperature.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 20, 2012
    Assignee: The Texas A&M University System
    Inventors: Mark T. Holtzapple, Cesar B. Granda
  • Publication number: 20110287497
    Abstract: A method for integrating biological conversion of mixed acids to hydrocarbons, hydrocarbon-like molecules, biofuels, and combinations thereof. The method including introducing fermentation products to at least one microorganism chosen from the group consisting of heterotrophic microorganisms, photo-mixotrophic microorganisms, chemo-autotrophic microorganisms, and combinations thereof.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 24, 2011
    Inventors: Mark T. Holtzapple, Cesar B. Granda, Erik Holtzapple
  • Publication number: 20110236937
    Abstract: A method for operating a fermenter system. In one instances, the method comprises flowing biomass and liquid in opposite directions through a fermenter train comprising a plurality of fermenters, and introducing a nutrient to any of the plurality of fermenters to optimize the production carboxylate products in the fermenter system.
    Type: Application
    Filed: March 24, 2011
    Publication date: September 29, 2011
    Applicant: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Aaron Douglas Smith, Mark T. Holtzapple
  • Patent number: 8022586
    Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.
    Type: Grant
    Filed: February 15, 2010
    Date of Patent: September 20, 2011
    Assignees: The Texas A&M University System, StarRotor Corporation
    Inventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
  • Publication number: 20110200476
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a earn plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.
    Type: Application
    Filed: December 23, 2010
    Publication date: August 18, 2011
    Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
  • Patent number: 7950250
    Abstract: According to one embodiment of the invention, a jet ejector method includes providing a primary jet ejector having a primary inlet stream, coupling one or more secondary jet ejectors to the primary jet ejector such that all of the jet ejectors are in a cascaded arrangement, bleeding off a portion of the primary inlet stream and directing the portion of the primary inlet stream to the secondary jet ejector that is closest to the primary jet ejector in the cascaded arrangement, and directing a motive fluid into the secondary jet ejector that is farthest from the primary jet ejector in the cascaded arrangement. The method further includes, at each secondary jet ejector, receiving at least some of the portion of the primary inlet stream and at least some of the motive fluid to create respective mixtures within the secondary jet ejectors, and at each secondary jet ejector, directing at least a portion of the respective mixture to adjacent jet ejectors in the cascaded arrangement.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: May 31, 2011
    Assignees: Terrabon Adve, LLC, The Texas A&M University System
    Inventors: Mark T. Holtzapple, Gary P. Noyes, George A. Rabroker
  • Publication number: 20100266435
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 21, 2010
    Applicant: The Texas A&M University System
    Inventors: Mark T. Holtzapple, George A. Rabroker
  • Publication number: 20100247360
    Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 30, 2010
    Applicant: The Texas A&M University System
    Inventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes
  • Publication number: 20100248318
    Abstract: In one embodiment, the disclosure includes a method of biomass conversion including fermenting biomass to produce a carboxylic acid or carboxylate salt and hydrogen gas, recovering the hydrogen gas, and converting the carboxylic acid or carboxylate salt to an alcohol using the hydrogen gas. In one embodiment, the hydrogen produced by biomass conversion may be converted to an acetate. Another embodiment relates to a biomass conversion system. The system may include: a fermentation unit for fermentation of biomass to a carboxylic acid or carboxylate salt in a fermentation broth and for production of a carbon dioxide and hydrogen gas stream, an extraction unit for extracting the carboxylic acid or carboxylate salt from the fermentation broth, a gas extraction unit for separation of the hydrogen gas and the carbon dioxide, and a production unit for production of an alcohol from the carboxylic acid or carboxylate salt using the hydrogen gas.
    Type: Application
    Filed: June 7, 2010
    Publication date: September 30, 2010
    Applicant: TEXAS A&M UNIVERSITY SYSTEMS
    Inventors: Cesar B. Granda, Mark T. Holtzapple, Richard R. Davison
  • Publication number: 20100213786
    Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.
    Type: Application
    Filed: February 15, 2010
    Publication date: August 26, 2010
    Applicants: The Texas A&M University System, StarRotor Corporation
    Inventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
  • Patent number: 7780099
    Abstract: According to one embodiment of the invention, a system for altering fluid flow includes a main body having a first fluid flowing therethrough, a plurality of conduits disposed within the main body to form a plurality of flow paths, and a nozzle directing a second fluid through the innermost conduit. The second fluid has a greater velocity than the first fluid. The second fluid successively entrains the first fluid flowing through the flow paths in such a manner that the portion of the first fluid flowing through the innermost flow path existing between the innermost conduit and its adjacent conduit is entrained first and the portion of the first fluid flowing through the outermost flow path existing between the outermost conduit and the main body is last.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: August 24, 2010
    Assignee: The Texas A&M University System
    Inventors: Mark T. Holtzapple, Othon Rediniotis
  • Publication number: 20100203625
    Abstract: According to one embodiment of the invention, a system for processing biomass comprises a chamber, a biomass input device, a fluid input device, and a retrieval device. The chamber is defined by at least a bottom, at least one wall, and a cover supported by the at least one wall. The biomass input device operable to deliver biomass into the chamber to form a biomass pile. The fluid input device is operable to deliver fluid into the chamber to the biomass pile. The retrieval device operable to receive fluid from the chamber.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 12, 2010
    Applicant: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Mark T. Holtzapple, Richard Davison, Cesar Granda, Gary P. Noyes, Edward Darlington, III
  • Publication number: 20100185021
    Abstract: A method of producing alcohols, hydrocarbons, or both from biomass by converting biomass into a carboxylic acid, reacting the carboxylic acid with an olefin to produce an ester and hydrogenolyzing the ester to produce alcohol. A method of producing hydrocarbons from biomass by converting at least a portion of the biomass into a carboxylic acid, a ketone, or an ammonium carboxylate salt, reacting at least one of a portion of the carboxylic acid, a portion of the ketone, or a portion of the ammonium carboxylate salt in an oligomerization reactor as at least part of a process that produces an oligomerization product and separating hydrocarbons from the oligomerization product.
    Type: Application
    Filed: December 2, 2009
    Publication date: July 22, 2010
    Applicant: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Michael Kyle Ross, Gary Luce, John Spencer, Rae Spencer, Mark T. Holtzapple, Cesar B. Granda, Sebastian Taco Vasquez
  • Publication number: 20100152485
    Abstract: In accordance with the teachings of the present invention, a system and method converting biomass into useful chemicals are provided. In a particular embodiment, the method includes fermenting biomass in one or more fermentors to produce a fermentation broth comprising ammonium carboxylate salts, the fermentors containing an ammonium carbonate or ammonium bicarbonate buffer. The method further includes reacting the ammonium carboxylate salts from the fermentors with a high-molecular-weight amine to produce amine carboxylate salt, and thermally cracking the amine carboxylate salt to produce carboxylic acid. In another embodiment, the ammonium carboxylate salts from the fermentors may be reacted with a low-molecular-weight amine to produce a low-molecular-weight-amine carboxylate salt.
    Type: Application
    Filed: February 3, 2010
    Publication date: June 17, 2010
    Applicant: TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Mark T. Holtzapple, Richard R. Davison, Cesar B. Granda, Frank K. Agbogbo, Zhihong Fu
  • Patent number: 7726959
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: June 1, 2010
    Assignee: The Texas A&M University
    Inventors: Mark T. Holtzapple, George A. Rabroker
  • Patent number: 7708865
    Abstract: According to one embodiment of the invention, a vapor-compression evaporation system includes a plurality of vessels in series each containing a feed having a nonvolatile component, a mechanical compressor coupled to the last vessel in the series and operable to receive a vapor from the last vessel in the series, a pump operable to deliver a cooling liquid to the mechanical compressor, a tank coupled to the mechanical compressor and operable to separate liquid and vapor received from the mechanical compressor, a plurality of heat exchangers coupled inside respective ones of the vessels, the heat exchanger in the first vessel in the series operable to receive the vapor from the tank, at least some of the vapor condensing therein, whereby the heat of condensation provides the heat of evaporation to the first vessel in the series, and wherein at least some of the vapor inside the first vessel in the series is delivered to the heat exchanger in the next vessel in the series, whereby the condensing, evaporating, a
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: May 4, 2010
    Assignees: Texas A&M University System, StarRotor Corporation
    Inventors: Mark T. Holtzapple, Gary P. Noyes, George A. Rabroker
  • Patent number: 7695260
    Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: April 13, 2010
    Assignees: The Texas A&M University System, StarRotor Corporation
    Inventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes
  • Patent number: 7663283
    Abstract: According to one embodiment of the present invention, an electric machine comprises a stator and a rotor. The stator has at least one stator pole with a first leg and a second leg. The rotor has at least one rotor pole. The rotor rotates relate to the stator. The at least one rotor is configured to rotate between the first leg and the second leg of the at least one stator pole.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: February 16, 2010
    Assignees: The Texas A & M University System, StarRoter Corporation
    Inventors: Mark T. Holtzapple, George A. Rabroker, Babak Fahimi, Mehrdad Ehsani
  • Publication number: 20100003152
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a cam plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.
    Type: Application
    Filed: January 21, 2005
    Publication date: January 7, 2010
    Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
  • Publication number: 20090324432
    Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.
    Type: Application
    Filed: October 21, 2005
    Publication date: December 31, 2009
    Inventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes