Patents by Inventor Andre Leneuf

Andre Leneuf 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).

  • Hydroxy-containing agents for chelating metal ions and a process for preparing same
    Patent number: 4116991
    Abstract: A chelating agent of the formula: ##STR1## wherein R.sub.1 through R.sub.5 are each selected from the group which consists of hydrogen, methyl, ethyl and propyl;S.sub.1 and S.sub.2 are each selected from the group which consists of hydrogen, --CH.sub.2 CH.sub.2 OH and alkyl having 1 to 12 carbon atoms;n is a whole number 1 through 4;Z.sub.1 through Z.sub.8 are substituents each selected from the group which consists of alkyl, alkoxyl, carboxy, formyl, acyl, carboxy substituted by alkyl, carboxamido, hydroxyl, amino, nitro, halo, and sulfo;Y.sub.1 is selected from the group which consists of --COOM.sub.2 and --CN;Y.sub.2 is selected from the group which consists of --COOM.sub.3 and --CN; andM.sub.1 through M.sub.4 are selected from the group which consists of hydrogen, ion, an alkali metal ion, ammonium and ammonium substituted by alkyl 1 to 4 times.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: September 26, 1978
    Assignee: Manufacture de Produits Chimiques Protex
    Inventor: Andre Leneuf