Patents by Inventor Roy Duncan

Roy Duncan 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: 20020045734
    Abstract: In accordance with the present invention, viral proteins that are responsible for membrane fusion and syncytium formation induced by three different fusogenic orthoreoviruses, i.e., avian reoviruses (ARV), Nelson Bay virus (NBV), and Baboon Reovirus (BRV), have been identified. The genes encoding these proteins have been cloned and sequenced; functional analysis thereof indicates that expression of these proteins in transfected cells results in cell-cell fusion.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 18, 2002
    Inventor: Roy Duncan
  • Patent number: 4064692
    Abstract: A design technique, method, and apparatus for varying the bypass ratio and modulating the flow of a gas turbine engine of the bypass type in order to achieve improved mixed mission performance. The disclosed preferred embodiments each include a gas flow control system for management of core and bypass stream pressure comprising diverter valve means downstream of the core engine to selectively mix or separate the core and bypass exhaust streams. The flow control system may also include variable geometry means for maintaining the engine inlet airflow at a matched design level at all flight velocities. Each preferred embodiment thus may be converted from a high specific thrust mixed flow cycle at supersonic velocities to a lower specific thrust separated flow turbofan system at subsonic velocities with a high degree of flow variability in each mode of operation, wherein the engine inlet airflow may be maintained at a matched design level at all engine velocities.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: December 27, 1977
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: James Edward Johnson, Tom Foster, Roy Duncan Allan
  • Patent number: 4030989
    Abstract: Metals from sulfate leach solutions derived from sulfide ores are electrowon in a cell divided by a permionic membrane whereby metal pregnant solution is fed to the cathode compartment and sulfuric acid is generated in the anode compartment.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: June 21, 1977
    Assignee: Anglonor S. A.
    Inventors: Milton Graham Montgomery Atmore, Roy Duncan Macpherson