Patents by Inventor Alexander H. Widiger, Jr.

Alexander H. Widiger, Jr. 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 density ion exchange resins from haloalkylated aromatic polymer
    Patent number: 4321331
    Abstract: High density ion exchange resins are prepared from cross-linked, haloalkylated monovinylidene aromatic polymers which have been halogenated in the presence of a Friedel-Crafts catalyst. For example, a cross-linked chloromethylated polystyrene brominated in the presence of ferric chloride (FeCl.sub.3) may be subsequently aminated to form a high density anion exchange resin useful in thick process slurries such as those employed in uranium recovery.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: March 23, 1982
    Assignee: The Dow Chemical Company
    Inventors: Alexander H. Widiger, Jr., Osro W. Randall, III, Steven M. Pulver