Patents by Inventor Raymond C. Harker

Raymond C. Harker 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).

  • CO.sub.2 removable from fluorocarbons by semipermeable membrane
    Patent number: 6156097
    Abstract: A process for removing carbon dioxide from a fluorocarbon carbon dioxide mixture in which the fluorocarbon carbon dioxide mixture is contacted with a semipermeable polyimide membrane to form at least one exit stream having an increased concentration of carbon dioxide and at least one exit stream having a reduced concentration of carbon dioxide.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: December 5, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William G. O'Brien, Charles J. Noelke, Raymond C. Harker, David John Van Bramer
  • Separation of CO.sub.2 from unsaturated fluorinated compounds by semipermeable membrane
    Patent number: 6123749
    Abstract: A process for separating carbon dioxide from an unsaturated fluorinated compound carbon dioxide mixture comprising contacting the unsaturated fluorinated compound carbon dioxide mixture with a semipermeable membrane to form at least one exit stream having an increased concentration of carbon dioxide and at least one other exit stream having a reduced concentration of carbon dioxide.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: September 26, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William G. O'Brien, Charles J. Noelke, Raymond C. Harker, David John Van Bramer