The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1988
Filed:
Oct. 13, 1987
Dieter Mohr, Schlangenbad, DE;
Engelbert Pliefke, Wiesbaden, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process for electrochemically modifying support materials of aluminum or aluminum alloys, which have been grained in a multi-stage process is disclosed. These support materials can be used in the production of offset printing plates. The support material is mechanically grained in a stage I, subjected to an intermediate treatment in a stage II, electrochemically grained in a stage III, subjected to an intermediate treatment in a stage IV and anodically oxidized in a stage V. The intermediate treatment in stages II and/or IV are carried out by an electrochemical process using a direct current. The anodizing stage may be followed by a hydrophilizing stage VI.