Patents by Inventor Jean-Claude Charbonnier

Jean-Claude Charbonnier 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 the chemical surface treatment of an aluminous product with a view to its phosphating
    Patent number: 4844748
    Abstract: This process for treating surfaces of products dip-coated in a bath of molten zinc and aluminum, and intended to be phosphated, involves pickling, preceding the phosphating, with a highly alkaline solution of high pH and containing zinc in solution. The process applies chiefly to products whose coating contains a high proportion of aluminum, particularly in the case of galvanized sheet metal, which it makes easier to phosphate. It is used for painted sheet metal for motor vehicles.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: July 4, 1989
    Assignee: Institut de Recherches de la Siderurgie Francaise (IRSID)
    Inventors: Jean-Claude Charbonnier, Alain Roche, Maurice Romand, Janine Lenoir, Eric Sahakian