Patents by Inventor Drew J. Drexler

Drew J. Drexler 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).

  • Stabilized concentrated sulphuric acid compositions
    Patent number: 5075086
    Abstract: The present invention provides a stabilized concentrated sulphuric acid composition containing a chemical additive selected from a group of aminoalkylphosphonates that increases the precipitation threshold of impurities in solution, thereby suppressing the precipitation of said impurities and the formation of "cloudy acid".
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: December 24, 1991
    Assignee: Marsulex Inc.
    Inventors: John T. Burton, Drew J. Drexler