Patents by Inventor Stephen Frederick Yates

Stephen Frederick Yates 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).

  • Selective solvent extraction for the purification of protected nucleosides
    Patent number: 6414137
    Abstract: A process for the purification of nucleosides, and more particularly to a selective solvent extraction method for purifying protected nucleosides. In the purification process, solid particles of protected nucleosides are selectively washed to remove undesirable polar and/or non-polar impurities, while leaving the solid particles substantially undissolved.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: July 2, 2002
    Assignee: AlliedSignal Inc.
    Inventors: Raymond J. Swedo, Mathias P. Koljack, Romulus Gaita, Stephen Frederick Yates, Charles Wu