Patents by Inventor John Thelen

John Thelen 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: 20140246622
    Abstract: A system for regenerating a desiccant bed having water adsorbed thereon to a desired moisture content comprising: a desiccant bed used to produce dry product gas having a first end and a second end; a source of feed gas, heated by a gas compression process fluidly connected to the desiccant bed wherein feed gas flows through the desiccant bed such that the heat present in the feed gas desorbs a portion of the moisture from the regenerating desiccant bed; and a source of cooling gas fluidly connected to the desiccant bed wherein the cooling gas flows through the desiccant bed in a closed loop such that moisture is desorbed from the bed as the desiccant bed cools and is carried back to the first end of the desiccant bed to provide additional cooling wherein moisture in the cooling gas is adsorbed.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Inventor: JOHN THELEN
  • Publication number: 20070261744
    Abstract: An adsorbent fractionator directional flow control valve assembly includes two inlet check poppet valves, two outlet check poppet valves, and a valve body. The valve assembly controls the directional flow of an influent gas mixture into one of two vertical desiccant tanks of an adsorbent fractionator, or desiccant dryer, and an effluent gas flowing in reverse through the opposite desiccant tank. The valve body is a single unitary piece, which may be a casting, and couples the inlet check poppet valves and the outlet check poppet valves, which may be four identical valve subassemblies, providing flow communication between these and an inlet port, two exit ports, and an outlet port.
    Type: Application
    Filed: July 13, 2007
    Publication date: November 15, 2007
    Inventor: John Thelen
  • Publication number: 20060130905
    Abstract: An adsorbent fractionator directional flow control valve assembly includes two inlet valves, two exhaust valves, and a valve body. The valve assembly controls the directional flow of an influent gas mixture into one of two vertical desiccant tanks of an adsorbent fractionator, or desiccant dryer, and an effluent gas flowing in reverse through the opposite desiccant tank. The valve body is a single unitary piece, which may be a casting, and couples the inlet valves and the exhaust valves, which may be four identical valve subassemblies, providing flow communication between these and an inlet port, two exit ports, and an exhaust port.
    Type: Application
    Filed: December 20, 2004
    Publication date: June 22, 2006
    Inventor: John Thelen
  • Publication number: 20050052713
    Abstract: In accordance with an embodiment of the present invention, an image capture device comprises a first scanning module operable to scan a first side of an object and a second scanning module operable to scan a second side of the object, the first and second scanning modules translatable along their respective displacement paths.
    Type: Application
    Filed: August 5, 2003
    Publication date: March 10, 2005
    Inventors: Kurt Spears, David Bohn, John Thelen
  • Patent number: 6744542
    Abstract: A reflective surface behind an image to be scanned on an optical image scanner, copier, facsimile machine or similar device. Preferably, the reflective surface has a reflectance less than 90% with a preferred reflectance range of 60% to 75%. This reflective surface is substantially integral with the scanner, copier or facsimile lid surface and substantially reduces image bleed-through while resulting in an acceptable level of color shift and an acceptable loss of dynamic range relative to a white surface. In a second embodiment, the reflective surface is interchangeable by the end user in order to optimize the reflectance of the reflective surface for any given document to be scanned, copied, or faxed.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: June 1, 2004
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Patrick Batten, John Thelen, James J. Graham, Judson Veazey, Julie T. Dawe