Patents by Inventor Jean E. Mansel

Jean E. Mansel 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).

  • Process for treating residual waters containing aromatic amines
    Patent number: 4415461
    Abstract: A process for destroying primary aromatic amines in residual waters by treating the residual waters containing said amines at a temperature between 40.degree. C. and 90.degree. C. and for a period longer than 5 minutes with a mixture of sulfuric acid and nitric acid or with a mixture of a solution of an alkali metal or ammonium nitrite and an acid, the final pH of the reaction medium being lower than 3.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: November 15, 1983
    Assignee: PCUK Produits Chimiques Ugine Kuhlmann
    Inventors: Jean E. Mansel, Charlie M. P. Masson, Paul Bertaux, Andre M. J. Grosmaitre