Patents by Inventor John Geerligs

John Geerligs 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: 8100671
    Abstract: Low pressure off gases such as from dry gas seals may be recompressed to a higher pressure using multiple tandem supersonic ejectors in which upstream ejectors operate at a higher nozzle exit Mach number than down stream ejectors and all ejectors are operated at exit Mach numbers greater than 1.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: January 24, 2012
    Assignee: TransCanada Pipelines Limited
    Inventors: Kamal K. Botros, John Geerligs, Hasan Imran
  • Patent number: 7794140
    Abstract: A method and system for monitoring the quality of a given gas mixture being transmitted under pressure by throttling a sample of the gas mixture to a representative pressure and measuring the hydrocarbon dew point of the sample at the representative pressure. The measured hydrocarbon dew point is indicative of the cricondentherm of the gas mixture. The representative pressure is pre-selected to provide a pre-selected margin of error between measured hydrocarbon dew points of a set of representative gas mixtures at the representative pressure and respective cricondentherms of the set of representative gas mixtures.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: September 14, 2010
    Assignee: Transcanada Pipelines Limited
    Inventors: Kamal Botros, Steve Hall, John Geerligs
  • Publication number: 20090201970
    Abstract: A method and system for monitoring the quality of a given gas mixture being transmitted under pressure by throttling a sample of the gas mixture to a representative pressure and measuring the hydrocarbon dew point of the sample at the representative pressure. The measured hydrocarbon dew point is indicative of the cricondentherm of the gas mixture. The representative pressure is pre-selected to provide a pre-selected margin of error between measured hydrocarbon dew points of a set of representative gas mixtures at the representative pressure and respective cricondentherms of the set of representative gas mixtures.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 13, 2009
    Applicant: TRANSCANADA PIPELINES LIMITED
    Inventors: KAMAL BOTROS, STEVE HALL, JOHN GEERLIGS
  • Publication number: 20080105315
    Abstract: Low pressure off gases such as from dry gas seals may be recompressed to a higher pressure using multiple tandem supersonic ejectors in which upstream ejectors operate at a higher nozzle exit Mach number than down stream ejectors and all ejectors are operated at exit Mach numbers greater than 1.
    Type: Application
    Filed: May 31, 2007
    Publication date: May 8, 2008
    Inventors: Kamal K. Botros, John Geerligs, Hasan Imran
  • Patent number: 5072141
    Abstract: A switch for an inductive load includes a first leg having a first field effect transistor connected between one terminal of the load to the high potential terminal of a power supply and a second leg having a second field effect transistor connected between the other terminal of the load and the low potential terminal of the power supply. A plurality of current paths located on opposite sides of the load terminals connected in parallel and extend from one of the load terminals to one of the power supply terminals. Each current path includes an inductor connected in series with a diode. A choke energy path is associated with each current path and includes a diode connected in series with a resistors. The inductors in the current paths operate to inhibit reverse recovery current through the diodes while the choke energy paths dissipate oscillation energy in the switch upon operation of the transistors to connect the inductive load across the terminals of the power supply.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: December 10, 1991
    Assignee: Nova Husky Research Corporation
    Inventors: Gyula Eisenbart, John Geerligs