Patents Assigned to Societe Civile de Recherche D.B.B.
  • Method and coloration of parts taken among parts made of zinc, coated with zinc and made of zinc containing alloy
    Patent number: 4943453
    Abstract: The part is subjected to action of an acid aqueous bath in order to cause the surface of the part to be porous over a thickness which is a fraction of the thickness of the zinc which it includes, and the part is caused to adsorb at least one sealing material.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: July 24, 1990
    Assignee: Societe Civile de Recherche D.B.B.
    Inventors: Yves Baziard, Robert Brun, Annette P. Duprat