Patents by Inventor Drew John Drexler

Drew John 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).

  • No.sub.x destruction in sulphuric acid
    Patent number: 5955050
    Abstract: A process is provided for the destruction of nitrogen oxides in sulfuric acid by adding a reducing agent, such as hydrazine, sulfamic acid or urea, and an oxidizing agent, such as hydrogen peroxide or persulfates, into the nitrogen oxides contaminated sulfuric acid. The nitrogen oxides contaminated sulfuric acid is treated at a temperature between 15.degree. C. and 100.degree. C.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: September 21, 1999
    Assignee: Marsulex Inc.
    Inventor: Drew John Drexler