Patents by Inventor Dan E. Goodwin

Dan E. Goodwin 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).

  • Method for hydrogenating functionalized polymer and products thereof
    Patent number: 4970254
    Abstract: A method for preparing hydrogenated polymers containing acidic functionality in a portion thereof initially containing ethylenic unsaturation from a polymer containing ethylenic unsaturation or both aromatic and ethylenic unsaturation comprising the steps of first incorporating an acidic functional group precursor radical into the polymer, hydrogenating at least a portion of the ethylenic unsaturation contained in the polymer containing the acidic functional group precursor radicals and then converting at least a portion of the acidic functional group precursor radicals to the corresponding acidic functional group. In general, any acidic functional group precursor radical which will have less of an impact upon the hydrogenation reaction than the corresponding acidic functional group may be used.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: November 13, 1990
    Assignee: Shell Oil Company
    Inventors: Carl L. Willis, Lorelle A. Pottick, Dan E. Goodwin