Patents by Inventor Jurgen Lindener

Jurgen Lindener 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).

  • Sealing anodically produced oxide layers, on aluminum
    Patent number: 4445983
    Abstract: A process for sealing anodically produced oxide layers on aluminum and aluminum alloys by treating them with an aqueous solution at a temperature between about 90.degree. C. and its boiling point, wherein the aqueous solution has a pH of from about 4 to about 8 and and contains from about 0.0005 to about 0.5 g/l of at least one phosphinocarboxylic acid or its water-soluble salt.
    Type: Grant
    Filed: August 30, 1983
    Date of Patent: May 1, 1984
    Assignee: Henkel KGaA
    Inventors: Hans J. Gohausen, Winfried Kirchhoff, Jurgen Lindener, Harald Wennemann
  • Method of sealing oxidized aluminum surfaces with aqueous solutions of polycarboxylic acids
    Patent number: 4121980
    Abstract: In the process of treating an aluminum or aluminum alloy surface which comprises anodically oxidizing the surface and subsequently sealing the surface, the improvement consisting of sealing in an aqueous solution at a temperature between 90.degree. C and the boiling temperature of the solution, said aqueous solution having a pH value of from 4 to 8 and containing from 0.0005 to 0.2 gm per liter of cycloaliphatic or aromatic polycarboxylic acid or water-soluble salt thereof, said cycloaliphatic or aromatic polycarboxylic acid having 4 to 6 carboxyl groups.
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: October 24, 1978
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
    Inventors: Hans Jurgen Gohausen, Winfried Kirchhoff, Jurgen Lindener