Patents by Inventor Lloyd Robert Snyder

Lloyd Robert Snyder 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).

  • Process for the purification of oligomers
    Patent number: 5811538
    Abstract: Methods for purifying an oligomer by normal phase column chromatography on a support selected from polyhydroxyethyl aspartamide, hydrophilic silica and silica from an oligomer impurity having a different nucleoside sequence are described. These methods are based upon the different retention times of the oligomer and the impurity on the column.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: September 22, 1998
    Assignee: Genta, Incorporated
    Inventors: Timothy Andrew Riley, Mark Alan Reynolds, Lloyd Robert Snyder, Robert E. Klem