Patents by Inventor Nawel KHELFALLAH

Nawel KHELFALLAH 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 coating metallic surfaces of substrates and articles coated by this process
    Patent number: 11389823
    Abstract: A method for coating metallic surfaces of substrates with surfaces of aqueous (coating) compositions in the form of a dispersion and/or a suspension containing at least one stabilized binder and a gelling agent, the cations having been dissolved out of the metallic surface of the substrate in a pretreatment stage and/or during the contacting. The invention further relates to such a coating based on an ionogenic gel, in which the coating is formed by a process further described herein.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 19, 2022
    Assignee: CHEMETALL GMBH
    Inventors: Wolfgang Bremser, Martin Droll, Oliver Seewald, Evgenija Niesen-Warkentin, Lars Schachtsiek, Manuel Traut, Michael Schwamb, Daniel Wasserfallen, Vera Sotke, Aliaksandr Frenkel, Ron Eilinghoff, Stephanie Gerold, Nawel Khelfallah
  • Process For Coating Metallic Surfaces of Substrates and Articles Coated By This Process
    Publication number: 20170066009
    Abstract: A method for coating metallic surfaces of substrates with surfaces of aqueous coating) compositions in the form of a dispersion and/or a suspension containing at least one stabilized binder and a gelling agent, the cations having been dissolved out of the metallic surface of the substrate in a pretreatment stage and/or during the contacting. The invention further relates to such a coating based on an ionogenic gel, in which the coating is formed by a process further described herein.
    Type: Application
    Filed: February 27, 2015
    Publication date: March 9, 2017
    Inventors: Wolfgang BREMSER, Martin DROLL, Oliver SEEWALD, Evgenija NIESEN-WARKENTIN, Lars SCHACHTSIEK, Manuel TRAUT, Michael SCHWAMB, Daniel WASSERFALLEN, Vera SOTKE, Aliaksandr FRENKEL, Ron EILINGHOFF, Stephanie GEROLD, Nawel KHELFALLAH