Patents by Inventor Frederick Peifer

Frederick Peifer 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).

  • Expansion tank airation device
    Patent number: 5344071
    Abstract: A method for purging water from flooded expansion tanks without necessitating the complete drainage and subsequent refilling of the systems allows for a stabilized hydronic water system in much less time with less effort and expense.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: September 6, 1994
    Inventor: Frederick Peifer