Patents by Inventor Russel J. MacDonald

Russel J. MacDonald 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).

  • Patent number: 4374206
    Abstract: Base stable aliphatic anion exchangers are produced by reacting a water soluble methacrylate ester quaternary amine monomer with a non-water soluble glycol dimethacrylate ester cross-linking monomer.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: February 15, 1983
    Assignee: Ionics Incorporated
    Inventors: Russel J. MacDonald, Russell B. Hodgdon