Patents by Inventor Walter Niderstatter

Walter Niderstatter 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).

  • Two-stage process for the production of anodically oxidized aluminum planar materials and use of these materials in manufacturing offset-printing plates
    Patent number: 4566952
    Abstract: Disclosed is a process for the production of a material in the form of a plate, a foil or a strip, from aluminum or an alloy thereof, which has been chemically, mechanically and/or electrochemically roughened. The process comprises a two-stage oxidation involving a first stage (a) which is performed in an aqueous electrolyte having from about 60 to 180 g/l of phosphoric acid, at a temperature of the electrolyte bath of about 47.degree. to 70.degree. C. and at a voltage of about 36 to 80 V and a second stage (b) which is performed in an aqueous electrolyte having from about 60 to 300 g/l of sulfuric acid, at a temperature of the electrolyte bath of about 30.degree. to 65.degree. C. and at a voltage of about 15 to 35 V. Also disclosed is an offset-printing plate, having a radiation-sensitive coating and a support material produced by the process described above.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: January 28, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Sprintschnik, Walter Niderstatter, Joachim Stroszynski