Patents by Inventor John C. McArdle

John C. McArdle 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).

  • Ion exchange resin regenerant waste recovery and recycling via bipolar membranes
    Patent number: 5352345
    Abstract: The present invention provides an improved process for the regeneration of ion exchange gels and resins. Exhausted regenerating solutions from a either a cationic or anionic exchange column are converted into fresh regenerating solutions via one or a combination of electrodialysis units having at least one bipolar membrane. The spent regenerants may be treated in an electrodialytic water splitter, an acid or base purification unit, or any combination thereof, to reclaim as much or as little of the regenerating solution as is required by the particular process.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: October 4, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Carolyn Byszewski, John C. McArdle, Krishnamurthy N. Mani