Patents by Inventor Pia Andreasson

Pia Andreasson 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).

  • Method of reducing the emission of NO.sub.x gas from a liquid containing nitric acid
    Patent number: 4938838
    Abstract: A method of reducing, by the addition of hydrogen peroxide, the emission of NO.sub.x gas in the treatment of a nitric acid-containing liquid is disclosed. In the method the redox potential of the liquid is measured and the amount of added hydrogen peroxide is adjusted in relation to the redox potential.
    Type: Grant
    Filed: September 10, 1987
    Date of Patent: July 3, 1990
    Assignee: Eka Nobel AB
    Inventors: Ivan Dalin, Pia Andreasson