Patents by Inventor David G. Hughes

David G. Hughes 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: 7681505
    Abstract: A station (2) in a personal rapid transit system has a platform (14), the edge of which defines bays (20) for parked vehicles (10). The parked vehicles are out of the path of travelling vehicles moving in a transit path extending between an entry section (4) and an exit section (6). The bays (10) include parking sections (22) alongside which the vehicles may park to enable easy transfer of passengers into and out of the vehicles. The disposition of the parking sections (22) allows the steered vehicles (10) to park close to the platform edge. The stations comprise bypass tracks (36) branched off the main track (30) and disposed in various configurations.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: March 23, 2010
    Assignee: Advanced Transport Systems, Ltd.
    Inventors: Martin V. Lowson, Christopher V. Cook, David G. Hughes
  • Patent number: 4909947
    Abstract: A process for detoxifying a high aqueous content hazardous waste stream having a water content greater than about 70 weight percent and comprising halogenated hydrocarbonaceous compounds which comprises the steps of: (a) contacting the hazardous waste stream containing halogenated hydrocarbonaceous compounds in the presence of hydrogen and in the absence of a basic compound with a hydrogenation catalyst comprising a refractory support and at least one metal having hydrogenation activity and which metal is selected from the metals of Groups VI-B and VIII of the Periodic Table in a hydrotreating reaction zone operated at conditions selected to hydrogenate at least a portion of the halogenated hydrocarbonaceous compounds which conditions include a pressure from about 100 psig (2068 kPa gauge) to about 5000 psig (34475 kPa gauge), a maximum catalyst temperature from about 250.degree. F. (121.degree. C.) to about 850.degree. F. (454.degree. C.) and a hydrogen circulation rate from about 200 SCFB (35.6 std. m.sup.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: March 20, 1990
    Assignee: UOP
    Inventors: Russell W. Johnson, Karl J. Youtsey, David G. Hughes
  • Patent number: 4769450
    Abstract: A process for recovering ceftazidime from an aqueous solution containing it, said solution being at a pH in the range 2.0 to 5.5, which comprises contacting the said solution with a non-functional macroreticular resin suitable for adsorbing ceftazidime, eluting the ceftazidime and isolating it, if desired in the form of a salt or hydrate.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: September 6, 1988
    Assignee: Glaxo Group Limited
    Inventors: Thomas W. Stone, Colin Robinson, David G. Hughes