Patents by Inventor Wayne G. Wessels

Wayne G. Wessels 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).

  • High purity polyether polyols
    Patent number: 4946939
    Abstract: High purity polyether polyol compositions such as polyethylene glycol are made having small amounts of impurities such as oligomers of active hydrogen compounds with alkylene oxides. The high purity is achieved by subjecting the polyether polyol compositions to membrane filtration to get less than about 10 parts per million of the low molecular weight oligomers.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: August 7, 1990
    Assignee: The Dow Chemical Company
    Inventors: Frank H. Murphy, Robert T. Jernigan, Jeff G. Grierson, Wayne G. Wessels