Patents by Inventor John S. Lettow

John S. Lettow 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: 20130150516
    Abstract: Compositions comprising graphene sheets. at least one reinforcing agent, and at least one rubber. The compositions may further comprise carbon black. The compositions may be formed into articles including tire components.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 13, 2013
    Applicant: Vorbeck Materials Corp.
    Inventor: John S. Lettow
  • Patent number: 8449959
    Abstract: Polymeric article reinforced with a reinforcing component. The reinforcing component includes a composition made from at least one polymer and graphene sheets.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: May 28, 2013
    Assignees: Kordsa Global Endustriyel Iplik Ve Kord Bezi Sanayi Ve Ticaret A.S., Vorbeck Materials Corp.
    Inventors: Ilhan A. Aksay, Bora Buyukdincer, Nurcin Javaherian, John S. Lettow, Gustavo Pino, Kate Redmond, Ibrahim O. Yildirim
  • Publication number: 20130033810
    Abstract: Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.
    Type: Application
    Filed: September 5, 2012
    Publication date: February 7, 2013
    Applicants: THE TRUSTEES OF PRINCETON UNIVERSITY, VORBECK MATERIALS CORPORATION
    Inventors: John M. CRAIN, John S. LETTOW, Ilhan A. AKSAY, Sibel KORKUT, Katherine S. CHIANG, Chuan-Hua CHEN, Robert K. PRUD'HOMME
  • Patent number: 8278757
    Abstract: Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: October 2, 2012
    Assignees: Vorbeck Materials Corporation, The Trustees of Princeton University
    Inventors: John M. Crain, John S. Lettow, Ilhan A. Aksay, Sibel A. Korkut, Katherine S. Chiang, Chuan-hua Chen, Robert K. Prud'Homme
  • Publication number: 20120244333
    Abstract: Fibers described herein comprise a composition including a polymer and graphene sheets. The fibers can be further formed into yarns, cords, and fabrics. The fibers can be in the form of polyamide, polyester, acrylic, acetate, modacrylic, spandex, lyocell fibers, and the like. Such fibers can take on a variety of forms, including, staple fibers, spun fibers, monofilaments, multifilaments, and the like.
    Type: Application
    Filed: September 16, 2011
    Publication date: September 27, 2012
    Applicants: KORDSA GLOBAL ENDUSTRIYEL IPLIK VE KORD BEZI SANAYI VE TICARET A.S., VORBECK MATERIALS CORP.
    Inventors: Ilhan A. Aksay, Suat H. Bekircan, John M. Crain, Sezen Gurdag, Emine Guven, Nurcin Javaherian, John S. Lettow, Kate Redmond, Ozlem Tekmek, Ali Vatansever, Ibrahim O. Yildirim
  • Publication number: 20120237749
    Abstract: Tire cords comprising fibers including at least one polymer and graphene sheets.
    Type: Application
    Filed: September 16, 2011
    Publication date: September 20, 2012
    Applicants: KORDSA GLOBAL ENDUSTRIYEL IPLIK VE KORD BEZI SANAYI VE TICARET A.S., VORBECK MATERIALS CORP.
    Inventors: Ilhan A. Aksay, Sezen Gurdag, Nurcin Javaherian, John S. Lettow, Gustavo Pino, Kate Redmond, Ali Vatansever, Ibrahim O. Yildirim
  • Publication number: 20120142832
    Abstract: Compositions comprising at least one polymer binder, graphene sheets, and graphite, wherein the ratio by weight of graphite to graphene sheets is from about 40:60 to about 98:2.
    Type: Application
    Filed: April 3, 2010
    Publication date: June 7, 2012
    Applicant: VORBECK MATERIALS CORP.
    Inventors: Vipin Varma, Dan Scheffer, Carl R. Ginneman, JR., John S. Lettow
  • Publication number: 20120121840
    Abstract: Polymeric article reinforced with a reinforcing component. The reinforcing component includes a composition made from at least one polymer and graphene sheets.
    Type: Application
    Filed: September 16, 2011
    Publication date: May 17, 2012
    Applicants: VORBECK MATERIALS CORP.
    Inventors: Ilhan A. Aksay, Bora Buyukdincer, Nurcin Javaherian, John S. Lettow, Gustavo Pino, Kate Redmond, Ibrahim O. Yildirim
  • Publication number: 20120103670
    Abstract: Articles comprising a composition comprising a polymeric binder and at least one carbonaceous filler, wherein the article has a compositional gradient such that the concentration of the filler is increased or decreased in at least one direction in the article. Methods for their preparation and structures comprising the articles are also described.
    Type: Application
    Filed: June 30, 2009
    Publication date: May 3, 2012
    Applicant: VORBECK MATERIALS CORP.
    Inventor: John S. Lettow
  • Patent number: 8034164
    Abstract: A pressure swing adsorption process including the step of separating a gas mixture by absorbing at least one gas component in an adsorbent mass provided within each vessel of a plurality of vessels. The separating step has a single pressure equalization cycle. The separating step is preferably performed with only four valves per vessel of the plurality of vessels. Additionally, a pressure swing adsorption system of the invention includes a plurality of vessels each containing therein an adsorbent mass configured to separate a gas mixture by absorbing at least one gas component in said adsorbent mass, where the system is configured to separate the gas mixture using a single pressure equalization cycle and includes only four valves per vessel of the plurality of vessels.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: October 11, 2011
    Assignee: Lummus Technology Inc.
    Inventors: Franklin D. Lomax, Jr., John S. Lettow
  • Publication number: 20110135884
    Abstract: Articles comprising a surface coated with a composition containing graphene sheets and at least one polymer binder where the articles have been bent at the coated surface after the coating was applied. Methods of making coated articles that are bent after coating.
    Type: Application
    Filed: April 6, 2010
    Publication date: June 9, 2011
    Applicant: VORBECK MATERIALS CORP.
    Inventors: John S. Lettow, Dan Scheffer
  • Publication number: 20110114189
    Abstract: Fuel system components comprising polymer compositions containing functionalized graphene sheets. The components are formed from the polymer compositions or are coated with the polymer composition.
    Type: Application
    Filed: April 6, 2009
    Publication date: May 19, 2011
    Applicant: VORBECK MATERIALS CORP.
    Inventors: John M. Crain, John S. Lettow, Kate Redmond
  • Publication number: 20110088931
    Abstract: Multilayer coatings comprising at least two layers wherein at least one layer comprises a composition comprising graphene sheets and at least one binder and wherein at least two layers have different compositions.
    Type: Application
    Filed: April 6, 2010
    Publication date: April 21, 2011
    Applicant: VORBECK MATERIALS CORP.
    Inventors: John S. Lettow, Dan Scheffer
  • Publication number: 20110049437
    Abstract: Coatings comprising functionalized graphene sheets and at least one binder. In one embodiment, the coatings are electrically conductive.
    Type: Application
    Filed: January 9, 2009
    Publication date: March 3, 2011
    Applicant: The Trustees of Princeton University
    Inventors: John M. Crain, John S. Lettow, Ilhan A. Aksay, Robert K. Prud'Homme, Sibel Korkut
  • Publication number: 20110042813
    Abstract: Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.
    Type: Application
    Filed: January 9, 2009
    Publication date: February 24, 2011
    Applicants: VORBECK MATERIALS CORPORATION, THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: John M. Crain, John S. Lettow, Ilhan A. Aksay, Sibel A. Korkut, Katherine S. Chiang, Chuan-hua Chen, Robert K. Prud'Homme
  • Patent number: 7645440
    Abstract: A catalyst that can be used for the production of hydrogen from hydrocarbon fuels in steam reforming processes contains an active metal of, e.g., at least one of Ir, Pt and Pd, on a catalyst support of, e.g., at least one of monoclinic zirconia and an alkaline-earth metal hexaaluminate. The catalyst exhibits improved activity, stability in both air and reducing atmospheres, and sulfur tolerance.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: January 12, 2010
    Assignees: Sud-Chemie Inc., Air Liquide
    Inventors: Franklin D. Lomax, Jr., John S. Lettow, Aaron L. Wagner, Jon P. Wagner, Duane Myers
  • Patent number: 7641716
    Abstract: A pressure swing adsorption process including the step of separating a gas mixture by absorbing at least one gas component in an adsorbent mass provided within each vessel of a plurality of vessels. The separating step has a single pressure equalization cycle. The separating step is preferably performed with only four valves per vessel of the plurality of vessels. Additionally, a pressure swing adsorption system of the invention includes a plurality of vessels each containing therein an adsorbent mass configured to separate a gas mixture by absorbing at least one gas component in said adsorbent mass, where the system is configured to separate the gas mixture using a single pressure equalization cycle and includes only four valves per vessel of the plurality of vessels.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: January 5, 2010
    Assignee: H2Gen Innovations, Inc.
    Inventors: Franklin D. Lomax, Jr., John S. Lettow
  • Patent number: 7600489
    Abstract: A heat exchange apparatus including a housing, a first array of fluid conduits provided within the housing, and a second array of fluid conduits provided within the housing. The first and second arrays of fluid conduits are configured to carry a first fluid. The heat exchange apparatus also includes a first fluid passageway provided within the housing, where the first fluid passageway is defined by an internal surface of the housing and by a baffle plate. The first fluid passageway is configured to carry a second fluid. The baffle plate is configured to divide the first fluid passageway into a first flow path and a second flow path, where the first array of fluid conduits extends through the first flow path and the second array of fluid conduits extends through the second flow path.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: October 13, 2009
    Assignee: H2Gen Innovations, Inc.
    Inventors: Franklin D. Lomax, Jr., John S. Lettow, Brian D. James
  • Publication number: 20090020014
    Abstract: A pressure swing adsorption process including the step of separating a gas mixture by absorbing at least one gas component in an adsorbent mass provided within each vessel of a plurality of vessels. The separating step has a single pressure equalization cycle. The separating step is preferably performed with only four valves per vessel of the plurality of vessels. Additionally, a pressure swing adsorption system of the invention includes a plurality of vessels each containing therein an adsorbent mass configured to separate a gas mixture by absorbing at least one gas component in said adsorbent mass, where the system is configured to separate the gas mixture using a single pressure equalization cycle and includes only four valves per vessel of the plurality of vessels.
    Type: Application
    Filed: September 26, 2008
    Publication date: January 22, 2009
    Applicant: H2GEN INNOVATIONS, INC.
    Inventors: Franklin D. LOMAX, JR., John S. Lettow
  • Publication number: 20080241057
    Abstract: A heat exchange apparatus including a housing, a first array of fluid conduits provided within the housing, and a second array of fluid conduits provided within the housing. The first and second arrays of fluid conduits are configured to carry a first fluid. The heat exchange apparatus also includes a first fluid passageway provided within the housing, where the first fluid passageway is defined by an internal surface of the housing and by a baffle plate. The first fluid passageway is configured to carry a second fluid. The baffle plate is configured to divide the first fluid passageway into a first flow path and a second flow path, where the first array of fluid conduits extends through the first flow path and the second array of fluid conduits extends through the second flow path.
    Type: Application
    Filed: May 9, 2008
    Publication date: October 2, 2008
    Applicant: H2GEN INNOVATIONS, INC.
    Inventors: Franklin D. LOMAX, John S. LETTOW, Brian D. JAMES